CN105159278A - Method for modifying parameters of CAN bus-based electric vehicle motor controller - Google Patents

Abstract

The invention discloses a method for modifying the parameters of a CAN bus-based electric vehicle motor controller. The method includes the following steps of: step A, parameter initialization; and step B, parameter online modification. Parameter initialization further includes the following steps that: a peripheral upper computer reads parameters stored in the last two addresses from the memory of the motor controller; and whether the read parameters are correct is verified. Parameter online modification further includes the following steps that: the peripheral upper computer issues a parameter modification instruction to the processor of the motor controller; and the processor reads the parameters stored in the memory and temporally stores the parameters in the random access memory of the motor controller. The method has the advantages of convenient and fast motor controller parameter modification, high modification accuracy and high reliability, and can decrease potential safety hazards in motor controller parameter modification.

Description

Based on the electric machine controller for motor vehicle parameter modification method of CAN

Technical field

The present invention relates to the electric machine controller for motor vehicle based on CAN, especially relate to the electric machine controller for motor vehicle parameter modification method based on CAN.

Background technology

Electric automobile becomes the trend of development of automobile with energy-conservation and oligosaprobic advantage, and therefore, the optimization for the electric machine controller for motor vehicle based on CAN seems more and more important.When described electric machine controller performance parameter needs to adjust, take the method for electric machine controller being carried out to software program refreshing to realize at present more.But car load installation is operated in the program updating of electric machine controller bother very much later, and there is adjustment specific aim difference and inefficient problem.

Summary of the invention

The object of the invention is to provide a kind of electric machine controller for motor vehicle parameter modification method based on CAN.

For achieving the above object, the present invention takes following technical proposals:

Electric machine controller for motor vehicle parameter modification method based on CAN of the present invention, comprises parameter initialization and parameter online modification two steps:

A, parameter initialization

From the storer of described electric machine controller, read the parameter of depositing in latter two address by the host computer of peripheral hardware, verification institute reads whether parameter is correct; If incorrect, from program constant table initiation parameter, and parameter from first address successively stored in storer; If correct, utilize the parameter initialization electric machine controller parameter stored in storer;

B, parameter online modification

Issued the instruction of amendment parameter to the processor of described electric machine controller by the host computer of peripheral hardware, described processor reads the parameter that stores in described storer and keeps in the random access memory of electric machine controller;

Described processor is uploaded to described host computer the parameter be temporarily stored in described random access memory by CAN;

Described host computer amendment needs the parameter value of amendment and preserves, and then the parameter value after renewal is issued to described processor by CAN;

Described processor is stored in described random access memory by receiving the parameter value after renewal;

Parameter value after renewal is back to described host computer by CAN by described processor, and this parameter value received and amendment record are compared and verify by host computer;

Described host computer issues write parameters instruction to described storer to described processor;

Parameter value after the renewal be stored in described random access memory is stored in storer by described processor, and the parameter after upgrading to be restarted as initiation parameter and come into force.

The invention has the advantages that the online modification of described electric machine controller parameter convenient, fast, amendment precision is high, good reliability, and reduces the potential safety hazard of amendment electric machine controller parameter existence.

Accompanying drawing explanation

The structured flowchart of the hardware system used when Fig. 1 is parameter modification of the present invention.

Fig. 2 is the process flow diagram of parameter initialization of the present invention.

Fig. 3 is the process flow diagram of parameter online modification of the present invention.

Embodiment

As shown in Figure 1, parameter modification hardware system of the present invention, host computer by peripheral hardware and the electric machine controller for motor vehicle based on CAN 1 form, and described electric machine controller for motor vehicle 1 comprises EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM(EEPROM:ElectricallyErasableProgrammableRead-OnlyM emory), processor and random access memory ram (RAM:Random-AccessMemory).EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM is connected with processor by iic bus, and random access memory ram is connected with processor by address, DCB, and processor is connected with the host computer of peripheral hardware with CAN communication module by CAN; EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM adopts AT24C022KIICEEPROM chip, can store 128 16 bit data, and processor adopts the STM32F103VET6 chip of ST company, and CAN communication module adopts the USB of lucky sunlight electricity company to turn CAN module.

When user needs change driving motor for electric automobile or adjust the parameter of driving motor for electric automobile, can according to driving motor for electric automobile parameter (as: rotor zero-bit, electric machine controller overvoltage protection limit value, electric machine controller under-voltage protection limit value, electric machine controller overheating protection limit value, motor overheating protection limit value, overspeed protection limit value, maximum driving torque, simulation torque, maximum braking torque, limit power percentage, acceleration/brake pedal the upper limit, acceleration/brake pedal lower limit etc.), the online modification work of corresponding motor controller parameter is completed voluntarily by the upper computer software of peripheral hardware, concrete operation step is as follows:

A, parameter initialization

As shown in Figure 2, from the storer of described electric machine controller, read the parameter of depositing in latter two address by the host computer of peripheral hardware, verification institute reads whether parameter is correct; If incorrect, from program constant table initiation parameter, and parameter from first address successively stored in storer; If correct, utilize the parameter initialization electric machine controller parameter stored in storer;

B, parameter online modification

Issued the instruction of amendment parameter to the processor of described electric machine controller by the host computer of peripheral hardware, described processor reads the parameter that stores in described storer and keeps in the random access memory of electric machine controller;

Described processor is uploaded to described host computer the parameter be temporarily stored in described random access memory by CAN;

Described host computer amendment needs the parameter value of amendment and preserves, and then the parameter value after renewal is issued to described processor by CAN;

Described processor is stored in described random access memory by receiving the parameter value after renewal;

Parameter value after renewal is back to described host computer by CAN by described processor, and this parameter value received and amendment record are compared and verify by host computer;

Described host computer issues write parameters instruction to described storer to described processor;

Parameter value after the renewal be stored in described random access memory is stored in storer by described processor, and the parameter after upgrading to be restarted as initiation parameter and come into force.

Claims (1)

1. based on an electric machine controller for motor vehicle parameter modification method for CAN, it is characterized in that: comprise parameter initialization and parameter online modification two steps:

A, parameter initialization

From the storer of described electric machine controller, read the parameter of depositing in latter two address by the host computer of peripheral hardware, verification institute reads whether parameter is correct; If incorrect, from program constant table initiation parameter, and parameter from first address successively stored in storer; If correct, utilize the parameter initialization electric machine controller parameter stored in storer;

B, parameter online modification

Issued the instruction of amendment parameter to the processor of described electric machine controller by the host computer of peripheral hardware, described processor reads the parameter that stores in described storer and keeps in the random access memory of electric machine controller;

Described processor is uploaded to described host computer the parameter be temporarily stored in described random access memory by CAN;

Described host computer amendment needs the parameter value of amendment and preserves, and then the parameter value after renewal is issued to described processor by CAN;

Described processor is stored in described random access memory by receiving the parameter value after renewal;

Parameter value after renewal is back to described host computer by CAN by described processor, and this parameter value received and amendment record are compared and verify by host computer;

Described host computer issues write parameters instruction to described storer to described processor;

Parameter value after the renewal be stored in described random access memory is stored in storer by described processor, and the parameter after upgrading to be restarted as initiation parameter and come into force.