MAX 50K-80K TL3 introduction
1. Product appearance
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1654595856990.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16563956161038.png)
MAX LV model and MAX MV model have same boards
2. System Diagram
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16545960277790.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16545963127102-1024x455.png)
3. Board Introduction
IO Board
![](https://www.amosplanet.org/wp-content/uploads/2023/04/企业微信截图_16818845875804-1024x691.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1654700628879-1024x564.png)
![](https://www.amosplanet.org/wp-content/uploads/2023/04/140ffaa95577afbfc2445c46f9f8888-1024x767.jpg)
SPD Board
It is used to prevent lighting strike
Inductor
It is used in BUS circuit and it is function is filtering wave
PID BUS Interface
PID means ” PotenTIal Induced DegradaTIon “, The direct harm of PID is that a large amount of charge accumulates on the surface of the cell, which deteriorates the passivation effect of the cell surface, resulting in a decrease in the fill factor, open-circuit voltage, and short-circuit current of the cell, and the power attenuation of the battery module.
SPS circuit
main SPS circuit
Internal and external fan driving circuit
3OP driving parallel wire
It is used to drive Boost and DC-AC circuit , SPS circuit on mainboard
Resistance
It has been cancelled in new MAX series.
Left Cover of Max Inverter
Main board
![](https://www.amosplanet.org/wp-content/uploads/2023/04/1681886129387.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1654939967959.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16549416095198.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16549418117986.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16550899384974.png)
PV INPUT board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1655210601394.png)
SPD board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655210937279.png)
Right Cover of Max Inverter
![](https://www.amosplanet.org/wp-content/uploads/2023/04/企业微信截图_16818863188312-1024x659.png)
AC Filtering board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1655211624994.png)
AC SPD board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1655212020730.png)
M3 board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16553726764374.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/07/企业微信截图_16571871926866.png)
Control board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16553735289918.png)
DSP Chip called 75 chip , Mainly deal with AC output Sampling data
AD chip called 67 chip, mainly deal with PV Sampling data
CPLD is used to produce wave and drive related circuit.
Communication Switch Board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1655373711010.png)
4. Board Position
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1655374118699.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1655374241340-1.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16553743605512.png)
5. Electrical Diagram Introdcution
Boost Circuit on mainboard
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1655375085911.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16553853028546.png)
Driving circuit of Boost Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16553854749177.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16553858306860.png)
BOOST. PWM1 is introduced into the main board from the control board through the 30PIN cable of the IO board, and outputs BoostA.PWM after passing through the optocoupler TLP352
As the driver of the BoostA. The other five are the same
INV Driving Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555171127461.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555171582748.png)
There are 12 routes in total on Inverter drive circuit, PWM through 8286 driver chip output Give to push-pull and then to Vge of IGBT
Full Bridge Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555174728301.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555171582748-1.png)
PV String Current Sampling Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555176932888-1.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555179218140.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555177953274-1.png)
String current sampling circuit, the string current passes through the string chip and outputs the sampling voltage, and output of the sampling circuit to the operational amplifier
After scaling, it is given to the AD port of the control board to convert the current.
Boost Current Sampling Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655523658561.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555238832347.png)
PV current through HCT (Current Sensing device) sampling, HCT voltage type, straightly Connect output sampling voltage. There are 6 routes in total
The PV current (BOOST inductor current) is sampled through the HCT. When a current flows through the HCT, the HCT itself outputs a sample signal. The sample voltage increases linearly (that is, the greater the current flowing, the greater the output voltage),
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555241359660.png)
HCT output sampling After the voltage is transported After zooming to the control panel AD port to read Get real-time PV curren
PV voltage Sampling Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555188112632.png)
PVA road is the reference test, other five
the same way. Sampling resistor at PVinput
Board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655518864711.png)
stream to PVA as a reference, The other five Same.op on IO board.
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655533716157.png)
The PV voltage is divided by the resistor and sent to the op amp for scaling, and then sent to the control AD port for operation, so as to sample the PV Voltage.
BOOST OCP Protection Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555313279850.png)
BOOST OCP Protection Circuit output voltage with an electron and diode via sampling current Op amp
Compare negative output of the comparator and positive voltage
BUS Voltage Sampling Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555197984490.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555200085680.png)
Negative BUS voltage Sampling Resistance
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555206264496.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555206599206.png)
Negative BUS voltage Sampling op amp The output is divided into Second, give to 075 and 067 control chip
Positive BUS voltage Sampling Resistance
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555208493650-1.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555209169989.png)
The total BUS voltage is summed by the positive and negative BUS voltages, and the positive and negative BUS voltages are sampled respectively, and then given by the op amp scaling.
The AD port of the control chip performs sampling and calculation to obtain the real-time voltage, and the output of the op amp is divided into two parts, which are respectively given to two different chips for sampling.
AC Current Sampling and OCP Protection Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555322124683.png)
HCT Current Sensing sampler
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555323115141.png)
voltage to the op amp after zooming
is given to control
Board AD port.
OCP is made by
After the sample is taken out separately
given to the comparator
AC Voltage Detecting Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555331904415.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555332975994.png)
Voltage sampling operation
output to
075 Chip
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555333307207.png)
Voltage sampling operation
output to
067 Chip
The grid voltage is given to the op amp after being divided by the resistor, and then given to the control chip after scaling, and the two chips are sampled separately
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555340813015.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555341144960.png)
The inverter voltage is divided by the resistor and given to the op amp, and after scaling, it is given to the control board for sampling operation.
R phase Relay Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555213788315.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655521477883.png)
S phase Relay Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555216566269.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655521477883-1.png)
T phase Relay Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555217787533.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655521477883-2.png)
When it is about to be connected to the grid, the relay detection is carried out, and by switching the relay, and control INV Circuit to form wave., so that the inverter output and the grid Voltage at the same frequency and the same volt value, compare the voltage difference between the inverter side and the grid side to judge whether the relay can work normally
Detection logic:
1. Before the inverter produces the wave (before the relay driver works), detect the voltage across the inverter and the grid, if there is a large voltage difference 80V indicates that the first step has passed the test;
2. After the inverter produces the wave, firstly close the inverter relay to detect the voltage across the inverter and the grid.
If there is no voltage difference between the two ends, it means the relay on the grid side is stuck (or on the inverter side).
3. After the inverter produces the wave, firstly disconnect the inverter side relay, and then close the grid side relay to detect the power at both ends of the inverter and the grid. If there is no voltage difference between the two ends, it means that the inverter relay is stuck (the above inverter side is excluded at this time), otherwise there is a voltage difference and is greater than 80V
It means that there is no sticking;
4. At this time, close the relay on the inverter side again, and check the voltage across the inverter and the grid. If there is no voltage difference. It means that the detection is normal, and it is connected to the grid. Otherwise, there is a voltage difference and it is greater than 80V, which means that the relay cannot be closed.
Main SPS Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555347134002.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555361007218.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555347781776-1.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555360025558.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555362794845-1.png)
Auxiliary power SPS adopts integrated DC SPS and AC SPS, that is, DC SPS and AC SPS share a transformer,
The secondary side outputs are together, and the DC SPS takes power from the BUS, adopts an overlapping flyback topology circuit, and uses 2844 for the control driver chip;
The AC SPS takes power from the ST two-phase uncontrolled rectification, and also uses the overlapping flyback topology circuit, and the control driver chip also uses 2844.
The primary side of the transformer is controlled separately
DC SPS or AC SPS operation is performed by voltage judgment through comparator.
Input voltage range: PV =200-1100v, AC= 210v-615V
Output voltage range: +15V, -15v, 8V, 8v convert to 5V( 2567 Buck chip Degarde ),24V (Fans), 24V converted to 5V( 2567 Buck chip Degarde, for communication ), 100V( PID Input Voltage ), 15V(PID Driving Voltage)
SPS Cirucuit on mainboard ( It is used for Boost and INV Driving Circuit)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555375215748.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_165553770660.png)
The BOOST drive voltage and inverter drive voltage of this model consist of an independent SPS. is a flyback topology, the control
chip is 2843, and there are 6 sets of outputs (the total output voltage of each channel is 22V, and then 15V is clamped by the Zener diode
and -7V. ), input 15V from main SPS output as power supply
PID Circuit( Potential Induced Degradation )
PID working principle: It is to increase the voltage between PE ( ground) and PV+, and optimize the panel at night. actually
The topology of PID boosting is a BOOST circuit. After the main SPS outputs 100V, the voltage is boosted to the set voltage value.
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555384932105.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16555406845063.png)
output, go
through the diode
directly after
PV input
positive electrode
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655540720381.png)
FAN Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557167191817.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557170255217.png)
GFCI Circuit (Ground Fault Circuit-Interrupter)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557179278954.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/2a844d9ec697a52475041bf9c531e3f-1-1024x767.jpg)
Principle: It is like RCD. When 3 phase in balance, current of Neutral line should be 0
Internal Communication Circuit (Between M3 board and control board)
Between 067 Chip on control board and M3 board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557188352591.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655719146641.png)
Between 075 Chip on control board and M3 board
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557192535263.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_1655719285790.png)
ISO Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557193691280.png)
The ISO detection circuit samples the voltage at both ends through the opening and closing of two relays, and then calculates the impedance between PV+ and PV- to PE. So as to determine whether it is OK.
30PIN Drive Row Wire
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557275657983.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557276625762.png)
1,2 GND Control ground
3 DRV.Fault Driving fault alert
4 DRV.RST
5 T3.PWM T phase G3 IGBT Driving
6 T4.PWM T phase G4 IGBT Driving
7 T1.PWM T phase G1 IGBT Driving
8 T2.PWM T phase G2 IGBT Driving
9 S3.PWM S phase G3 IGBT Driving
10 S4.PWM S phase G4 IGBT Driving
11 S1.PWM S phase G1 IGBT Driving
12 S2.PWM S phase G2 IGBT Driving
13 R3.PWM R phase G3 IGBT Driving
14 R4.PWM R phase G4 IGBT Driving
15 R1.PWM R phase G1 IGBT Driving
16 R2.PWM R phase G2 IGBT Driving
17 BoostE.PWM BOOST E Driving
18 BoostF.PWM BOOST F Driving
19 BoostC.PWM BOOST C Driving
20 BoostD.PWM BOOST D Driving
21 BoostA.PWM BOOST D Driving
22 BoostB.PWM BOOST B Driving
23 TEMp.INV INV Temperature detecting
24 TEMp.BOOST BOOST Temperature detecting
25, 26 GND Control ground
27 +5V Main SPS power Supply
28 -15V Main SPS power Supply -15V
29.30 +15V Main SPS power supply +15V
50PIN Drive Row Wire
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557798936988.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16557799492982.png)
1、 2 pin:
PIDF.V PIDF.G
PID F Route Voltage Sampling
3、 4 pin:
PIDE.V PIDE.G
PID E Route Voltage Sampling
5、 6 pin:
PIDD.V PIDD.G
PID D Route Voltage Sampling
7、 8 pin:
PID C Route Voltage Sampling
9、10 pin:
PID B Route Voltage Sampling
11、12 pin:
PIDA.V PIDA.G
PID A Route Voltage Sampling
13、14 pin
PVF.V+ PVF.G
PV F Route Voltage Sampling
15、16 pin
PV E Route Voltage Sampling
17、18 pin
PVD.V+ PVD.G
PV D Route Voltage Sampling
19、20 pin
PVC.V+ PVC.G
PV C Route Voltage Sampling
21、22 pin
PVB.V+ PVB.G
PVB Route Voltage Sampling
23、24 pin
PVA.V+ PVA.G
PVA Route Voltage Sampling
25、26 pin
BoostF.I BoostF.G
PV F Route Inductor current Sampling
27、28 pin
BoostE.I BoostE.G
PVE Route inductor current Sampling
29、30 pin
BoostD.I BoostD.G
PV D Route inductor current Sampling
31、32 pin
BoostC.I BoostC.G
PV C Route Inductor Current Sampling
33、34 pin
BoostB.I BoostB.G
PV B Route Inductor Current Sampling
35、36 pin
BoostA.I BoostA.G
PV A Route Inductor Current Sampling
37 pin
PVF1_I
PVF Route String Current Sampling
38 pin
PVE1_I
PV E Route String Current Sampling
39 pin
PVD1_I
PVD String Current Sampling
40 pin
PVC1_I
PV C Route String Current Sampling
41 pin
PVB1_I
PVB Route String Current Sampling
42 pin
PVA1_I
PVA String Current Sampling
43、44、45、46 pin
GND
Control Ground
47、48、49、50 pin
+5V
Main SPS power supply +5V
12 PIN Communication Row Wire
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16558005267332.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16558122476522.png)
1 pin
+3.3V.S
SPS power supply +3.3V.S
2 pin
+24V
SPS power supply 24V
3、 4 pin
+5V.S
SPS power supply +5V.S
5、 6 pin
GND.S
Communication control ground
7 pin
SCITX.67_107.RX
067 sending data
8 pin
SCIRX.67_107.TX
067 receiving data
9 、10 pin
GND.S
Communication control ground
11 pin
SCITX.75_107.RX
075 sending data
12 pin
SCIRX.75_107.TX
075 receiving data
30 pin Communication row wire
![](https://www.amosplanet.org/wp-content/uploads/2022/06/企业微信截图_16558137876365.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/06/1655813902056.png)
1,2 pin
USB D+ USB D-
USB differential signal
3,4 pin
USB_VBUS
USB output BUS voltage
5 pin
485.B
485.B Signal
6, 15, 20,26 pin
GND.S
Communication control ground
7 pin
485.A
485 A signal
8 pin
RS232B-EN
232B Enable signal
9 pin
RS232B-RX
232B Receiving signal
10 pin
RS232B-TX
232B Sending signal
11 pin
RS232.RX
232A Receiving data
12 pin
RS232A.TX
232A Sending data
13 pin
CANTX_107
CAN Sending signal
14 pin
CANRX_107
CAN Receiving data
16 pin
USB.ID
17、18 pin
+5V.S_OUT
Chip output 5V
19 pin
+3.3V.S
SPS power supply 3.3V.S
21-25 pin
27 pin
RE_IO3
28 pin
+24V.S
SPS power supply 24V.S
29 pin
RE_102
30 PIN
RE_101