Auxiliary system for metal oxide semiconductor (MOS) tube aluminum substrate

Abstract

The utility model discloses a metal oxide semiconductor (MOS) tube aluminum substrate auxiliary system, which is connected with a main control board system through a contact pin and is controlled by the main control board system, adopts a printed circuit board (PCB) structure of which the front surface is provided with elements and the back surface is provided with an aluminum substrate, and comprises a three-phase current detection module, comprising three phase current detection circuits used for detecting phase current of a three-phase motor in real time, and the phase current detection circuits realize phase current detection through a phase current detection chip, a current detection resistor, a switching tube formed by connecting an N-MOS upper tube and an N-MOS lower tube in series, and a path from a power supply positive electrode to a power supply negative electrode; the illumination driving module comprises a headlight illumination driving unit for controlling headlights and a taillight illumination driving unit for controlling taillights; the power supply filtering module comprises a plurality of patch high-voltage capacitors which are connected in parallel between the power supply positive electrode and the power supply negative electrode; and the temperature detection module comprises a plurality of temperature detection resistors for detecting the temperature in real time.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric bicycle current detection technical field, concretely relates to a MOS tube aluminum substrate auxiliary system. BACKGROUND

[0002] At present, the MOS tube aluminum substrate auxiliary system based on three-phase motor phase current detection technology is widely used on mountain electric bicycles in domestic and foreign markets, and the MOS tube aluminum substrate auxiliary system detects current data in real time and transmits the detection data to the main control panel system.

[0003] The MOS tube aluminum substrate auxiliary system based on three-phase motor phase current detection technology has the following advantages:

[0004] The current fluctuation of the motor can be monitored in real time, accurate current working data is provided, the output of the motor can be dynamically adjusted according to the load change, the working efficiency of the vehicle power system is improved, and the vehicle is more stable and sensitive under different riding conditions.

[0005] The running state of the motor can be monitored in real time, and when the current waveform is abnormal, the main control panel system can issue an alarm in advance to avoid damage to the motor caused by load overload or overheating, thereby reducing maintenance cost and prolonging the service life of the mountain electric bicycle.

[0006] Under the condition that the structure size of the main control panel system is limited, the space condition of the MOS aluminum substrate auxiliary system is fully utilized, and the use function can be expanded according to the user's demand, such as increasing the intelligent lighting system of the headlight and the tail light, and the intelligent lighting system can automatically adjust the brightness according to the vehicle speed and the environmental light change.

[0007] At the same time, the MOS tube aluminum substrate auxiliary system based on the three-phase motor phase current detection technology also has the following shortcomings:

[0008] The cost of the MOS tube aluminum substrate auxiliary system using high-precision three-phase current detection sensors is high, and the electric bicycle using this new technology has a high selling price, which may affect the market competitiveness of the electric bicycle.

[0009] Real-time detection and analysis of three-phase current data require strong processing capability, especially in extreme working environments such as high temperature or humid weather conditions, which requires close cooperation between the main control panel system and the auxiliary system, and the auxiliary system has the ability of efficient and accurate collection of current data and temperature data.

[0010] At the same time, the detection of three-phase current, under the driving of large current, the MOS tube aluminum substrate auxiliary system has poor heat dissipation effect, and the temperature rises too high and too fast. UTILITY MODEL CONTENTS

[0011] In view of the deficiencies in the prior art, the utility model provides a MOS tube aluminum substrate auxiliary system, MOS tube aluminum substrate auxiliary system integrates three phase current detection module, illumination drive module, power filter module, illumination drive module adopts three phase current detection circuit real time detection three phase current, adopts a plurality of temperature detection resistance real time detection PCB board temperature, can real time detection PCB board's temperature in detection three phase current, can effectively improve the accuracy of current detection, temperature detection, improve the stability of system whole.

[0012] The utility model provides the following technical scheme:

[0013] A MOS tube aluminum substrate auxiliary system is connected with the main control board system through the pin and is controlled by the main control board system, the MOS tube aluminum substrate auxiliary system adopts the PCB board structure that positive face sets up element, reverse face sets up aluminum base piece;

[0014] The MOS tube aluminum substrate auxiliary system comprises:

[0015] The three phase current detection module comprises three phase current detection circuits for real time detection of three phase motor phase currents, the phase current detection circuit realizes the detection of the phase current through a phase current detection chip, a current detection resistor, a switching tube composed of an N-MOS upper tube and an N-MOS lower tube, and a path from a power supply positive pole to a power supply negative pole, wherein the N-MOS upper tube and the N-MOS lower tube of each phase current detection circuit are arranged in a staggered manner on the PCB board, and the current detection resistor of each phase current detection circuit is close to the phase current detection chip;

[0016] The illumination drive module comprises a headlight illumination drive unit for controlling the headlight and a tail light illumination drive unit for controlling the tail light;

[0017] The power filter module comprises a plurality of patch high-voltage capacitors connected in parallel between the power supply positive pole and the power supply negative pole.

[0018] The temperature detection module comprises a plurality of temperature detection resistors for real time detection of temperature.

[0019] Further, the phase current detection circuit comprises a phase current detection chip, a current detection resistor, an N-MOS upper tube, an N-MOS lower tube, and a protection assembly composed of a first diode and a second diode.

[0020] The source of the N-MOS upper tube is connected with the VS end of the phase current detection chip and the drain of the N-MOS lower tube, the drain of the N-MOS upper tube is connected with an external power supply, and the gate of the N-MOS upper tube and the N-MOS lower tube is connected with the single-chip microcomputer of the main control board system.

[0021] The gate and the drain of the N-MOS upper transistor are connected with the first resistor, and the source of the N-MOS upper transistor is connected with the first capacitor;

[0022] The first end of the detection resistor is connected with the source of the N-MOS lower transistor and the reverse input end of the phase current detection chip respectively, and the second end of the detection resistor is connected with the negative electrode of the power supply and the same direction input end of the phase current detection chip respectively;

[0023] The positive electrode of the second diode is connected with the first end of the detection resistor, and the negative electrode of the second diode is connected with the second end of the detection resistor;

[0024] The negative electrode of the first diode is connected with the first end of the detection resistor, and the positive electrode of the first diode is connected with the second end of the detection resistor;

[0025] The distance from the second end of the detection resistor to the negative electrode of the power supply, the distance from the first end of the detection resistor to the reverse input end of the phase current detection chip, and the distance from the second end of the detection resistor to the same direction input end of the phase current detection chip are all equal.

[0026] Further, the phase current detection circuit further comprises a current detection control component composed of a second resistor, a third resistor and a fourth resistor, for controlling unidirectional / directional current detection.

[0027] The first end of the second resistor, the third resistor and the fourth resistor is connected with the REF end of the phase current detection chip; the second end of the second resistor is connected with the external power supply; and the second end of the third resistor and the fourth resistor is grounded.

[0028] Further, the phase current detection circuit further comprises an RC filter network composed of a fifth resistor, a sixth resistor and a second capacitor.

[0029] The first end of the fifth resistor is connected with the first end of the detection resistor, and the second end of the fifth resistor is connected with the reverse input end of the phase current detection chip.

[0030] The first end of the sixth resistor is connected with the second end of the detection resistor, and the second end of the sixth resistor is connected with the same direction input end of the phase current detection chip.

[0031] The first end of the second capacitor is connected with the reverse input end of the phase current detection chip, and the second end of the second capacitor is connected with the same direction input end of the phase current detection chip.

[0032] Further, the phase current detection circuit further comprises a TVS tube for surge absorption protection, the first end of the TVS tube is connected with the first end of the detection resistor, and the second end of the TVS tube is connected with the second end of the detection resistor.

[0033] Further, the temperature detection module comprises a plurality of temperature detection resistors arranged at the insertion pins, the upper N-MOS and the lower N-MOS.

[0034] Further, the copper foil wires at the positive electrode contact and the negative electrode contact are plated with solder.

[0035] Further, the copper foil wires at the positive electrode contact and the negative electrode contact are plated with solder.

[0036] Further, the MOS tube aluminum substrate auxiliary system is provided with copper foil pad areas of the same size at the front side of the MOS tube aluminum substrate auxiliary system.

[0037] Further, the MOS tube aluminum substrate auxiliary system is provided with heat dissipation copper strips above each module at the front side of the MOS tube aluminum substrate auxiliary system, and the heat dissipation copper strips are connected with the negative electrode contact; the heat dissipation copper strips are symmetrically curved in a 1 / 4 circular arc shape at both ends.

[0038] Compared with the prior art, the MOS tube aluminum substrate auxiliary system has the following beneficial effects:

[0039] The MOS tube aluminum substrate auxiliary system integrates a three-phase current detection module, an illumination driving module, a power filter module and an illumination driving module, and the modules are uniformly arranged on the PCB, so that the current data and the temperature data can be accurately detected, and the heat dissipation capacity of the PCB is enhanced.

[0040] The three-phase current detection module is designed to have three same phase current detection circuits for real-time detection of three-phase current, so that the current of each phase of the three-phase motor can be accurately measured, and the energy utilization rate of the electric bicycle under different riding conditions is improved.

[0041] The heat dissipation capacity of the MOS tube aluminum substrate auxiliary system is further increased by arranging the heat dissipation copper strips on the front side of the PCB, plating the positive electrode contact, the negative electrode contact and the three-phase contact on the front side of the PCB with solder, plating the copper foil wires at the positive electrode contact and the negative electrode contact with solder, and arranging the copper foil pad areas of the same size at the front side of the MOS tube aluminum substrate auxiliary system, so that the data detection accuracy and the electric control performance of the PCB are balanced, and the service life of the MOS tube aluminum substrate auxiliary system is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The electronic hardware design block diagram of the utility model is shown in the figure;

[0043] Figure 2 The phase current detection circuit diagram is shown in the figure;

[0044] Figure 3 The bidirectional current detection application output response curve diagram is shown in the figure;

[0045] Figure 4 The figure is a schematic diagram of the position relationship of the elements on the PCB. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0047] The utility model will be described in further detail in combination with the drawings as follows:

[0048] The embodiment provides a MOS tube aluminum substrate auxiliary system, the MOS tube aluminum substrate auxiliary system adopts the PCB board structure that element is arranged on the front surface and aluminum substrate is arranged on the back surface, and the MOS aluminum substrate auxiliary system is connected with the main control board system and is controlled by the main control board system through the pin. The MOS aluminum substrate auxiliary system does not output any connection harness on the wire harness structure, and it is only connected with the main control board system; all external output and input wire harnesses are realized through the main control board system.

[0049] The MOS tube aluminum substrate auxiliary system comprises:

[0050] The three-phase current detection module comprises three phase current detection circuits (A-phase current detection circuit, B-phase current detection circuit and C-phase current detection circuit) for detecting three-phase motor phase currents in real time, the phase current detection circuit realizes the detection of the phase current through a phase current detection chip, a current detection resistor, a switching tube composed of a series connection of an N-MOS upper tube and an N-MOS lower tube, a path from a power supply positive pole to a power supply negative pole, and transmits the detected phase current data to the main control board system; wherein the N-MOS upper tube and the N-MOS lower tube of each phase current detection circuit are arranged in a staggered manner on the PCB, and the current detection resistor of each phase current detection circuit is close to the phase current detection chip;

[0051] The lighting driving module comprises a headlight lighting driving unit for controlling the headlight and a tail light lighting driving unit for controlling the tail light; the headlight lighting driving unit adopts a TX4130L power supply stabilizing chip with large current output capacity and a stabilizing power supply driving circuit, the headlight power supply stabilizing chip does not have an enable end control, and only accepts an on-off control signal from the single-chip microcomputer of the main control board system; the tail light lighting driving unit selects a low-cost SY8501FCC power supply stabilizing chip and a stabilizing power supply driving circuit, the tail light power supply stabilizing chip has an enable end on-off control, and simultaneously accepts an on-off control signal from the single-chip microcomputer of the main control board system;

[0052] Power filter module, including a plurality of parallel SMD1210 package 10uF / 100V high voltage capacitor; the capacitor with large current can be connected in parallel between B-end and power ground to realize ground coupling, so as to enhance the anti-interference ability of MOS tube aluminum substrate auxiliary system, and further improve the stability of the system;

[0053] Temperature detection module, including a plurality of high-precision NTC temperature detection resistors for real-time temperature detection, the temperature detection resistor is arranged at the pin, the N-MOS upper tube and the N-MOS lower tube connection, and the detected temperature data is transmitted to the main control board system;

[0054] The electronic hardware design of MOS tube aluminum substrate auxiliary system is described in Figure 1 .

[0055] The design and working process of the three-phase current detection circuit are the same. In this embodiment, the A-phase current detection circuit is taken as an example to specifically describe the design of the phase current detection circuit. Please refer to Figure 2 .

[0056] The phase current detection circuit includes a phase current detection chip U1, a current detection resistor R3, an N-MOS upper tube, an N-MOS lower tube, a protection component (composed of a first diode D1 and a second diode D2) for transient protection, a current detection control component (composed of a second resistor R4, a third resistor R5 and a fourth resistor R6) for controlling single / dual-direction current detection, an RC filter network (composed of a fifth resistor R1, a sixth resistor R2 and a second capacitor C3), and a TVS tube for surge absorption protection.

[0057] The selection of the current detection resistor of the phase current detection circuit is extremely important. The greater the resistance value of the detection resistor, the higher the precision of the current detection chip, but the power consumption of the resistor itself is also greater, and the chip bias current is also increased, which will cause the increase of the offset error and further reduce the common mode rejection of the chip. In actual application, the detection resistor is also limited by the maximum power loss of the chip (<450mW) and the maximum current (+-20A), so the maximum value of the detection resistor is 1.1mΩ. In this embodiment, the current detection resistor R3 adopts two parallel stacked SMD2512 package 0.2mΩ / 3W patch alloy resistors on the PCB board.

[0058] The connection relationship of the elements of the phase current detection circuit is as follows:

[0059] The source of the N-MOS upper tube is connected with the VS end of the phase current detection chip U1 and the drain of the N-MOS lower tube, the drain of the N-MOS upper tube is connected with a +3.3V power supply or a +5V power supply, the gate of the N-MOS upper tube and the gate of the N-MOS lower tube are connected with the single-chip microcomputer of the main control panel system to receive the control signal of the single-chip microcomputer, the first resistor (10KΩ / 0603 resistor) is connected between the gate and the drain of the N-MOS upper tube, and the source of the N-MOS upper tube is connected with the first capacitor (SMD0603, 0.1uF / 50V). The phase current detection chip U1 itself does not have a turn-off control pin, so the N-MOS upper tube is added at the VS end of the chip 6 to realize the turn-off function.

[0060] The first end of the detection resistor R3 is connected with the source of the N-MOS lower tube and the reverse input end IN- of the phase current detection chip U1, and the second end of the detection resistor R3 is connected with the negative electrode B- of the power supply and the same direction input end IN+ of the phase current detection chip U1.

[0061] The positive electrode of the second diode D2 is connected with the first end of the detection resistor R3, and the negative electrode of the second diode D2 is connected with the second end of the detection resistor R3; the negative electrode of the first diode D1 is connected with the first end of the detection resistor R3, and the positive electrode of the first diode D1 is connected with the second end of the detection resistor R3.

[0062] In order to obtain more accurate current data, when the PCB board layout is routed, the distance from the second end of the detection resistor R3 to the negative electrode B- of the power supply, the distance from the first end of the detection resistor R3 to the reverse input end IN- of the phase current detection chip U1, and the distance from the second end of the detection resistor R3 to the same direction input end IN+ of the phase current detection chip U1 are all equal, and the directions of the phase current detection chip U1, the detection resistor R3 and the negative electrode B- of the power supply are consistent.

[0063] The current detection control assembly for controlling the single / dual-direction current detection is composed of the second resistor R4, the third resistor R5 and the fourth resistor R6, and users can select different resistors according to the requirements to realize the selection of different detection modes.

[0064] The connection relationship of the elements of the current detection control assembly is that the first ends of the second resistor R4, the third resistor R5 and the fourth resistor R6 are connected with the REF end of the phase current detection chip U1; the second end of the second resistor R4 is connected with a +3.3V power supply or other voltage power supply; and the second ends of the third resistor R5 and the fourth resistor R6 are grounded.

[0065] The principle of single / dual-direction current detection: the current detection chip U1 detects the current flowing through the detection resistor R3 from two directions, and the output voltage is offset by applying a voltage on the 5-pin REF end. When the reference voltage on the REF end is not equal to 0, the chip output voltage is greater than the reference voltage applied on the REF end when a positive differential voltage is detected on the IN+ input end; similarly, the chip output voltage is greater than the reference voltage applied on the REF end when a negative differential voltage is detected on the IN- input end. When the reference voltage on the REF end is equal to 0, the output of the chip will be in a saturated low state, similar to the condition when there is no signal input.

[0066] In this embodiment, when the working mode is single-direction current detection, the second resistor R4 and the third resistor R5 are not attached, and only the fourth resistor R6 is configured. At this time, the level voltage of the 5-pin REF end of the phase current detection chip U1 is 0, so as to realize single-direction current detection.

[0067] When the working mode is dual-direction current detection, the fourth resistor R6 is not attached, and the second resistor R4 and the third resistor R5 are configured. At this time, the level voltage of the 5-pin REF end of the phase current detection chip U1 is the external power voltage of the second resistor R4, so as to realize dual-direction current detection.

[0068] The output voltage response curve obtained by applying the above phase current detection circuit for dual-direction current detection is shown in Figure 3 For a positive differential input signal, the output voltage is higher than the reference voltage; for a negative differential input signal, the output voltage is lower than the reference voltage.

[0069] The connection relationship of the RC filter network composed of the fifth resistor R1, the sixth resistor R2, and the second capacitor C3 with the phase current detection circuit is as follows:

[0070] The first end of the fifth resistor R1 is connected with the first end of the detection resistor R3, and the second end of the fifth resistor R is connected with the reverse input end IN- of the phase current detection chip U1;

[0071] The first end of the sixth resistor R2 is connected with the second end of the detection resistor R3, and the second end of the sixth resistor R2 is connected with the same-direction input end IN+ of the phase current detection chip U1;

[0072] The first end of the second capacitor C3 is connected with the reverse input end IN- of the phase current detection chip U1, and the second end of the second capacitor C3 is connected with the same-direction input end IN+ of the phase current detection chip U1.

[0073] In this embodiment, the amplification factor of the phase current detection chip U1 is 20 times, and at this time, the resistance matched with the input end of the chip is 25KΩ. The INA18X series of similar current detection chips can be selected to improve the voltage amplification factor; the INA18X series of similar current detection chips with double channels can be selected to expand the current detection range.

[0074] The connection relationship of the TVS tube for surge absorption protection and the phase current detection circuit is that the first end of the TVS tube is connected with the first end of the detection resistor R3, and the second end of the TVS tube is connected with the second end of the detection resistor R3.

[0075] The three-phase current detection circuits are uniformly arranged on the front surface of the PCB board, so that the phase currents of the three-phase motor can flow into the PCB board as evenly as possible, thereby ensuring the stability of the electrical performance and effectively improving the anti-interference capability.

[0076] The working process of the phase current detection circuit is as follows:

[0077] The PWM voltage signal from the N-MOS lower tube passes through the 0.1 mΩ / 3W / SMD2512 current detection resistor R3 to the negative pole of the B-supply voltage; the upper end signal of the current detection resistor R3 passes through the D1 / D2 bidirectional limiting protection (transient protection), the TVS1 surge absorption protection, and the C3 filter capacitor, and is added to the IN- reverse input end of the U1 phase current detection; the lower end signal of the current detection resistor R3 passes through the D1 / D2 bidirectional limiting protection (transient protection), the C3 filter capacitor, and is added to the IN+ same direction input end of the U1 phase current detection; through the optional voltage gain (20-200) of the phase current detection chip, the 20 times chip internal comparison amplification is set, the current detection signal is output from the OUT end of the chip 1, and the detected phase current data is transmitted to the main control board system through the pin of the A-phase MOS tube aluminum base auxiliary system and the main control board system.

[0078] The real-time monitoring of the three-phase current data is closely related to the element layout of the PCB board and the temperature control of the PCB board. The greater the working current is, the greater the heat generated by the elements is, the faster the temperature of the PCB board rises, and there is a risk of burning the N-MOS tube, which will bring great danger to the vehicle; the better the temperature control is, the smaller the temperature rise is, the higher the electrical control performance is, and the better the vehicle reliability is. The positional relationship of the key elements on the PCB board is as shown in Figure 4 .

[0079] The following means are adopted in the embodiment to control the temperature of the PCB board:

[0080] The width of the copper foil trace of the B- end on the front surface of the PCB board is increased (from 3 mm to 6 mm). The power supply lines of the B+ end and the B- end are thickened, and a safety distance is left between the power supply lines, the control signal lines, and the current lines.

[0081] The B+ end and the B- end junctions on the front surface of the PCB board and the junctions of the three phases (the cylindrical copper columns of the A phase / B phase / C phase) are all tinned to increase the electric conduction and heat dissipation performance. The copper foil traces of the B+ end and the B- end on the front surface of the PCB board are all tinned to increase the electric conduction and heat dissipation performance.

[0082] On the PCB board, a ground resistance bridge (0R / 0805) is added.

[0083] On the front of the PCB board, a copper foil pad area of the same size is arranged to increase the heat dissipation performance.

[0084] On the front of the PCB board, a heat dissipation copper strip with symmetrical 1 / 4 circular arc bending at both ends is arranged, the diameter of the copper strip is 2.0 mm, the length of the copper strip is designed according to the area of the PBC board, the larger the area of the PBC board is, the greater the length of the copper strip is.

[0085] On the back of the PCB board, an aluminum substrate with excellent heat dissipation performance is arranged, the thickness of the aluminum substrate is 1.6 mm.

[0086] In the laboratory indoor environment (less environmental interference, room temperature is 25 DEG C), the prototype is tested by using a test power supply and test equipment to verify the performance of the MOS tube aluminum substrate auxiliary system.

[0087] Technical index requirement: the phase current of the product under the condition of installing a three-phase motor is 80A, the temperature under the slow running of the motor does not exceed 85 DEG C, the temperature under the high-speed running of the vehicle online does not exceed 130 DEG C, the PCB board semi-finished product (MOS tube aluminum substrate auxiliary system) is tested first, and then the whole machine (PCB board plus main control board system) is tested.

[0088] The test results of the PCB board semi-finished product (MOS tube aluminum substrate auxiliary system) are shown in Table 1:

[0089] Table 1

[0090]

[0091] Since the A-phase detection circuit is located on the left side of the PCB board, the B-phase detection circuit is located in the middle of the PCB board, and the C-phase detection circuit is located on the right side of the PCB board, the temperature of the middle part of the PCB board (the B-phase detection circuit area) is higher, and the heat dissipation performance is poorer than that of the two sides.

[0092] The test results of the whole machine (PCB board plus main control board system) are shown in Table 2:

[0093] Table 2

[0094]

[0095] According to the test results shown in the above table, the prototype meets the technical index.

[0096] The above merely is preferred embodiment of the present utility model, and is not for limiting the present utility model, for the person skilled in the art, the present utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A MOSFET aluminum substrate auxiliary system, connected with a main control board system through a pin and controlled by the main control board system, characterized in that, The MOS tube aluminum substrate auxiliary system adopts a PCB board structure with elements arranged on the front surface and aluminum substrates arranged on the back surface; The MOS tube aluminum substrate auxiliary system comprises: The three-phase current detection module comprises three phase current detection circuits for detecting the phase currents of the three-phase motor in real time, and the phase current detection circuit detects the phase current through a phase current detection chip, a current detection resistor, a switching tube composed of a series connection of an N-MOS upper tube and an N-MOS lower tube, and a path from the positive electrode of the power supply to the negative electrode of the power supply; wherein the N-MOS upper tube and the N-MOS lower tube of each phase current detection circuit are arranged in a staggered manner on the PCB board, and the current detection resistor of each phase current detection circuit is arranged close to the phase current detection chip; The lighting driving module comprises a headlight lighting driving unit for controlling the headlight and a tail light lighting driving unit for controlling the tail light; The power supply filtering module comprises a plurality of patch high-voltage capacitors connected in parallel between the positive electrode of the power supply and the negative electrode of the power supply; The temperature detection module comprises a plurality of temperature detection resistors for detecting the temperature in real time.

2. The MOSFET aluminum substrate assist system of claim 1, wherein, The phase current detection circuit comprises a phase current detection chip, a current detection resistor, an N-MOS upper tube, an N-MOS lower tube, and a protection component composed of a first diode and a second diode; The source of the N-MOS upper tube is connected with the VS end of the phase current detection chip and the drain of the N-MOS lower tube, the drain of the N-MOS upper tube is connected with an external power supply, and the gates of the N-MOS upper tube and the N-MOS lower tube are connected with a single-chip microcomputer of a main control board system; The gate and the drain of the N-MOS upper tube are connected with a first resistor, and the source of the N-MOS upper tube is connected with a first capacitor; The first end of the detection resistor is connected with the source of the N-MOS lower tube and the reverse input end of the phase current detection chip, and the second end of the detection resistor is connected with the negative electrode of the power supply and the same direction input end of the phase current detection chip; The anode of the second diode is connected with the first end of the detection resistor, and the cathode of the second diode is connected with the second end of the detection resistor; The cathode of the first diode is connected with the first end of the detection resistor, and the anode of the first diode is connected with the second end of the detection resistor; The distance from the second end of the detection resistor to the negative electrode of the power supply, the distance from the first end of the detection resistor to the reverse input end of the phase current detection chip, and the distance from the second end of the detection resistor to the same direction input end of the phase current detection chip are all equal.

3. The MOSFET aluminum substrate assist system of claim 2, wherein, The phase current detection circuit further comprises a current detection control component composed of a second resistor, a third resistor, and a fourth resistor, which is used for controlling unidirectional / directional current detection; The first ends of the second resistor, the third resistor, and the fourth resistor are connected with the REF end of the phase current detection chip; the second end of the second resistor is connected with an external power supply; and the second ends of the third resistor and the fourth resistor are grounded.

4. The MOSFET aluminum substrate assist system of claim 2, wherein, The phase current detection circuit further comprises an RC filter network composed of a fifth resistor, a sixth resistor, and a second capacitor; The first end of the fifth resistor is connected with the first end of the detection resistor, and the second end of the fifth resistor is connected with the reverse input end of the phase current detection chip; The first end of the sixth resistor is connected with the second end of the detection resistor, and the second end of the sixth resistor is connected with the same direction input end of the phase current detection chip; The first end of the second capacitor is connected with the reverse input end of the phase current detection chip, and the second end of the second capacitor is connected with the same direction input end of the phase current detection chip.

5. The MOSFET aluminum substrate assist system of claim 2, wherein, The phase current detection circuit further comprises a TVS tube for surge absorption protection, a first end of the TVS tube is connected with the first end of the detection resistor, and a second end of the TVS tube is connected with the second end of the detection resistor.

6. The MOSFET aluminum substrate assist system of claim 1, wherein, The temperature detection module comprises a plurality of temperature detection resistors arranged at the insertion pins, the upper N-MOS tube and the lower N-MOS tube.

7. The MOSFET aluminum substrate assist system of claim 1, wherein, The power positive electrode contact point, the power negative electrode contact point and the three-phase electric contact points are all plated with soldering tin.

8. The MOSFET aluminum substrate assist system of claim 1, wherein, The copper foil wires at the power positive electrode contact point and the power negative electrode contact point are all plated with soldering tin.

9. The MOSFET aluminum substrate assist system of claim 1, wherein, The MOS tube aluminum substrate auxiliary system is provided with copper foil pad areas of the same size at the front empty space.

10. The MOSFET aluminum substrate assist system of claim 1, wherein, A heat dissipation copper strip is arranged above each module on the front of the MOS tube aluminum substrate auxiliary system, and the heat dissipation copper strip is connected with the power negative electrode contact point; the heat dissipation copper strip has symmetrical 1 / 4 circular arc bending at both ends.

Images