A kind of offline auxiliary test equipment for vehicle motor controller
By designing an off-line auxiliary test equipment for vehicle motor controllers that includes diodes, capacitors, DC/DC units, MCUs, relays and isolation units, the problem that existing technology cannot effectively test vehicle motor controllers is solved and achieved Effective testing of CAN communication, interlocking signals and power supply systems to meet production needs and reduce costs.
Patent Information
- Application Number
- CN202010276856.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-10
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2040-04-10
AI Technical Summary
The prior art cannot effectively test CAN communication, interlocking signals and power supply systems of automotive motor controllers.
A vehicle motor controller off-line auxiliary test equipment is designed, which uses components such as diodes, capacitors, DC/DC units, MCUs, relays and isolation units to realize low-voltage power supply, high-voltage power supply, discharge function and voltage detection, through the CAN bus Send test results.
This equipment can effectively test the CAN communication, interlock signal and power supply system of the motor controller to meet production needs, has low cost, and improves system reliability through photoelectric isolation.
Smart Images
Figure CN113515101B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of motor controller testing, and in particular to offline auxiliary testing equipment for a motor controller for a vehicle. Background Art
[0002] Before leaving the factory, the on-board motor controller of new energy vehicles needs to test CAN communication, interlocking signals, power supply system, etc., and report to the host computer display to detect faulty parts in time, reduce the failure rate of products leaving the factory, and improve the yield rate of products leaving the factory.
[0003] The existing technology cannot test the motor controller well, so we propose an offline auxiliary test equipment for the vehicle motor controller to solve the above problem. Summary of the invention
[0004] The purpose of the present invention is to solve the shortcoming in the prior art that the motor controller cannot be tested well, and to propose an off-line auxiliary test device for a motor controller for a vehicle.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions:
[0006] A vehicle motor controller offline auxiliary test device, comprising a diode D1, wherein the positive electrode of the diode D1 is connected to one end of a capacitor C2, the other end of the capacitor C2 is connected to the negative electrode of the diode D1, the capacitor C2 is connected to a DC / DC unit, the DC / DC unit is connected to a low-voltage interface and an MCU, the MCU comprises an AD port, a CAN port and an IO module, the CAN port and the low-voltage interface adopt bidirectional transmission, the low-voltage interface is connected to the AD port, the MCU is connected to a relay K1, a relay K2 and one end of an isolation unit, the other end of the relay K1 is connected to a resistor One end of R1, the other end of the resistor R1 is connected to the other end of the relay K2, and the other end of the other end of the resistor R1 is connected to the capacitor C1, one end of the resistor R2 and the isolation unit, the other end of the relay K1 is connected to one end of the relay K2, the other end of the capacitor C1 is connected to the positive electrode of the diode D2, the other end of the diode D2 is connected to one end of the relay K1, the other end of the resistor R2 is connected to the collector of the transistor Q1 and the negative electrode of the diode D3, the positive electrode of the diode D3 is connected to the emitter of the transistor Q1, and the base of the transistor Q1 is connected to the other end of the isolation unit.
[0007] Preferably, the diode D1 and the diode D2 are connected to a three-phase or single-phase power supply.
[0008] Preferably, the low-voltage interface is connected to a motor controller and a host computer, and the host computer is electrically connected to the motor controller.
[0009] Preferably, the motor controller is connected to the motor M.
[0010] Compared with the prior art, the present invention has the following beneficial effects:
[0011] (1) Low-voltage power supply: After the device rectifies the AC power, it generates a 5V power supply through the DCDC unit to meet the low-voltage power supply needs of the device's own control part; it generates 12V and 24V power supplies to the low-voltage interface, which can provide low-voltage power supply for the motor controller;
[0012] (2) High-voltage power supply: After the low-voltage power supply is normal, the MCU controls the relay K1 to close through the IO port. At this time, the output voltage (bus voltage) rises slowly under the current limiting effect of the pre-charging resistor R1. When the MCU detects that the bus voltage reaches a certain level through the AD port, it closes the relay K2 to complete the high-voltage power supply and output it to the motor controller;
[0013] (3) Discharge function: When the motor is in the power generation mode, the MCU detects that the bus voltage has increased and controls the IGBT to reverse, consuming the excess power in the system through resistor R2 to prevent the system voltage from being too high and damaging the equipment;
[0014] (4) Voltage detection: MCU detects bus voltage and low voltages such as 12V / 24V through AD acquisition and transmits it to the host computer through the CAN bus;
[0015] (5) Interlock signal detection: The interlock signal line of the motor controller is located at the low-voltage interface and interconnected with the low-voltage interface of this device. When the MCU detects a reasonable voltage value on the signal line, it means that the interlock signal is normal, otherwise it means that the interlock signal line is disconnected;
[0016] (6) Host computer: The host computer is responsible for sending instructions to the device and motor controller, collecting feedback signals from the two, displaying faults, and generating offline test reports. In addition, in order to improve the reliability of the system, all external interfaces and the internal control and drive parts of the entire system will be completely photoelectrically isolated to maximize signal reliability and reduce interference.
[0017] The present invention can effectively test CAN communication, interlocking signals, power supply systems, etc., meet actual production needs, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a system block diagram of an off-line auxiliary test device for a vehicle motor controller proposed by the present invention. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0020] Reference Figure 1 A vehicle motor controller offline auxiliary test device includes a diode D1, a positive electrode of the diode D1 is connected to one end of a capacitor C2, the other end of the capacitor C2 is connected to the negative electrode of the diode D1, the capacitor C2 is connected to a DC / DC unit, the DC / DC unit is connected to a low-voltage interface and an MCU, the MCU includes an AD port, a CAN port and an IO module, the CAN port and the low-voltage interface adopt bidirectional transmission, the low-voltage interface is connected to the AD port, the MCU is connected to a relay K1, a relay K2 and one end of the isolation unit, the other end of the relay K1 is connected to one end of a resistor R1 end, the other end of the resistor R1 is connected to the other end of the relay K2, and the other end of the other end of the resistor R1 is connected to the capacitor C1, one end of the resistor R2 and the isolation unit, the other end of the relay K1 is connected to one end of the relay K2, the other end of the capacitor C1 is connected to the anode of the diode D2, the other end of the diode D2 is connected to one end of the relay K1, the other end of the resistor R2 is connected to the collector of the transistor Q1 and the cathode of the diode D3, the anode of the diode D3 is connected to the emitter of the transistor Q1, and the base of the transistor Q1 is connected to the other end of the isolation unit.
[0021] In the present invention, the diode D1 and the diode D2 are connected to a three-phase or single-phase power supply.
[0022] In the present invention, the low voltage interface is connected to the motor controller and the host computer, and the host computer is electrically connected to the motor controller.
[0023] In the present invention, the motor controller is connected to the motor M.
[0024] In the present invention, after the AC power of the mains is rectified, a 5V power supply is generated through the DCDC unit to meet the low-voltage power supply requirements of the control part of the device itself; 12V and 24V power supplies are generated to the low-voltage interface, which can provide a low-voltage power supply for the motor controller. After the low-voltage power supply is normal, the MCU controls the relay K1 to be closed through the IO port. At this time, the output voltage (bus voltage) rises slowly under the current limiting effect of the pre-charging resistor R1. When the MCU detects that the bus voltage reaches a certain level through the AD port, the relay K2 is closed to complete the high-voltage power supply and output it to the motor controller. When the motor is in the power generation mode, the MCU detects that the bus voltage rises, controls the IGBT to be reversed, and consumes the excess power in the system through the resistor R2 to prevent the system from being overcharged. The voltage is too high and damages the equipment. The MCU detects the bus voltage and low voltages such as 12V / 24V through AD acquisition, and transmits it to the host computer through the CAN bus. The interlock signal line of the motor controller is located at the low-voltage interface and interconnected with the low-voltage interface of this device. When the MCU detects a reasonable voltage value on the signal line, it means that the interlock signal is normal, otherwise it means that the interlock signal line is disconnected. The host computer is responsible for sending instructions to this device and the motor controller, and collecting feedback signals from the two, displaying faults, and generating offline test reports. In addition, in order to improve the reliability of the system, all external interfaces of the entire system and the internal control part and drive part of the system will be completely photoelectrically isolated to maximize the reliability of the signal and reduce interference.
[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A vehicle motor controller offline auxiliary test equipment, comprising a diode D1, characterized in that: Applicable to the test of the motor controller, the positive electrode of the diode D1 is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to the negative electrode of the diode D1, the capacitor C2 is connected to a DC / DC unit, the DC / DC unit is connected to a low-voltage interface and an MCU, the MCU includes an AD port, a CAN port and an IO module, the CAN port and the low-voltage interface adopt bidirectional transmission, the low-voltage interface is connected to the AD port, the MCU is connected to a relay K1, a relay K2 and one end of the isolation unit, the other end of the relay K1 is connected to one end of a resistor R1, and the resistor R2 is connected to the MCU. The other end of the resistor R1 is connected to the other end of the relay K2, and the other end of the other end of the resistor R1 is connected to the capacitor C1, one end of the resistor R2 and the isolation unit, the other end of the relay K1 is connected to one end of the relay K2, the other end of the capacitor C1 is connected to the positive electrode of the diode D2, the other end of the diode D2 is connected to one end of the relay K1, the other end of the resistor R2 is connected to the collector of the transistor Q1 and the negative electrode of the diode D3, the positive electrode of the diode D3 is connected to the emitter of the transistor Q1, and the base of the transistor Q1 is connected to the other end of the isolation unit; The low-voltage interface is connected to the motor controller and a host computer, and the host computer is electrically connected to the motor controller; the host computer is used to send instructions to the offline auxiliary test equipment of the vehicle motor controller and the motor controller; Used to collect feedback signals from both and display faults; and for generating offline test reports; The motor controller is connected to a motor M; The test equipment rectifies the AC power of the mains, and generates a 5V power supply through the DCDC unit to supply low-voltage power to the control part of the test equipment itself; generates 12V and 24V power supplies to the low-voltage interface, and provides low-voltage power supply to the motor controller to achieve low-voltage power supply; After the low-voltage power supply is normal, the MCU controls the relay K1 to close through the IO port, and the output voltage slowly rises under the current limiting effect of the resistor R1. The MCU closes the relay K2 based on the detected bus voltage, completes the high-voltage power supply, and outputs it to the motor controller; the output voltage is the bus voltage to achieve high-voltage power supply; When the motor is in the power generation mode, the MCU detects that the bus voltage increases and controls the IGBT to turn on, and consumes the excess power in the system through the resistor R2 to achieve the discharge function; The MCU detects the bus voltage and 12V / 24V low voltage through AD acquisition, and transmits them to the host computer through the CAN bus to realize voltage detection; The interlock signal line of the motor controller is located at the low-voltage interface and interconnected with the low-voltage interface of the test equipment. When the MCU detects the voltage value on the interlock signal line, it determines the state of the interlock signal; the state of the interlock signal includes a normal state and a disconnected state to realize interlock signal detection.
2. The vehicle motor controller offline auxiliary test equipment according to claim 1 is characterized in that: The diode D1 and the diode D2 are connected to a three-phase or single-phase power supply.
Citation Information
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