Direct current power estimation method, device and electronic equipment

Abstract

The present invention provides a DC power estimation method, device and electronic equipment, wherein the method includes: receiving the torque instruction sent by the vehicle controller; obtaining the actual current value of the DQ axis of the motor; according to the torque instruction and the actual current value, to obtain the given voltage value of the DQ axis; to obtain the AC power of the motor according to the given voltage value and the actual current value; to obtain the DC voltage and output current of the motor controller; to obtain the DC voltage and output current from the preset comparison The power loss of the motor controller corresponding to the DC voltage and output current is determined in the table; from the AC power of the motor and the power loss of the motor controller, an estimate of the DC power of the battery connected to the motor controller is obtained. The present invention obtains the DC power estimation value of the battery by estimating the ready-made variables generated by the motor controller, cancels the DC current sensor, saves the use space of the motor controller, and optimizes the overall structural layout of the motor controller.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a DC power estimation method, device and electronic equipment. Background technique [0002] In an electric vehicle, the motor controller MCU (Moter Control Unit) receives the communication instructions from the vehicle controller VCU (Vehicle Control Unit), and converts the DC power of the battery into AC power to drive the motor. At the same time, the MCU will convert its own The running state is fed back to the VCU and displayed on the instrument connected to the VCU. One of the contents fed back by the MCU is the DC discharge power of the battery, which is used for the driver to know whether the battery is currently in a discharging state or a charging state, as well as the specific power value. How much is it? In order to accurately measure the DC discharge power of the battery, it is often necessary to use a current sensor. The current sensor is installed at the i...

AI Technical Summary

Problems solved by technology

[0002] In an electric vehicle, the motor controller MCU (Moter Control Unit) receives the communication instructions from the vehicle controller VCU (Vehicle Control Unit), and converts the DC power of the battery into AC power to drive the motor. At the same time, the MCU will convert its own The running state is fed back to the VCU and displayed on the instrument connected to the VCU. One of the contents fed back by the MCU is the DC discharge power of the battery, which is used for the driver to know whether the battery is currently in a discharging state or a charging state, as well as the specific power value. How much is it? In order to accurately measure the DC discharge power of the battery, it is often necessary to use a current sensor. The current sensor is installed at the inlet of the MCU, which will affect the overall structural layout of the MCU and cause a waste of space.

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