Motor controller direct current bus voltage optimization control method
A DC bus voltage and motor controller technology, which is applied in the direction of AC motor control, motor, control system, etc., can solve the problems that the performance of the electric drive system cannot be further optimized, and the dynamic relationship between the DC bus voltage and the electric drive system cannot be established. The effect of improving work efficiency
Pending Publication Date: 2021-08-24
HEFEI JUYI POWER SYST CO LTD
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Problems solved by technology
[0003] In the current technology, the DC bus voltage of the motor controller is mainly divided into constant voltage control with DC-DC module and traditional control without DC-DC module. Establish the dynamic relationship between the DC bus voltage and the electric drive system, so that the performance of the electric drive system cannot be further optimized
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[0036] Such as figure 1 As shown, it is the control principle diagram adopted by the motor controller DC bus voltage optimization control method proposed by the present invention, which is mainly composed of a high-voltage battery module, a high-voltage DC-DC module, a motor control inverter module and a permanent magnet synchronous motor connected in sequence The high-voltage battery module provides high-voltage DC input for the electric drive system; the high-voltage DC-DC module uses a three-phase Boost circuit, the input terminal is connected to the battery terminal, and the high-voltage DC input is boosted to adjust to the required DC bus voltage; the motor control The inverter adopts a three-phase half-bridge inverter, which outputs three-phase AC voltage and is connected to control the motor.
[0037] The motor controller DC bus voltage optimization control method proposed by the present invention specifically includes the following steps:
[0038] S1. First obtain the...
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The invention discloses a motor controller direct current bus voltage optimization control method, which comprises the following steps of: firstly, acquiring efficiency data of an electric drive system under different direct current bus voltages, including torque and rotating speed; performing data processing on the efficiency data of the electric drive system, and analyzing and searching the relationship between the system efficiency and the direct-current bus voltage; further obtaining corresponding system optimal efficiencies under different torques and rotating speeds and direct current bus voltage values under the system optimal efficiencies, and determining corresponding optimal direct current bus voltage values under different working conditions; and finally, obtaining a corresponding id / iq current instruction value in the motor control under the optimal voltage control; and repeating the steps for different working modes. By revealing the relation between the direct current bus voltage and the efficiency of the electric driving system, the direct current bus voltage is further adjusted in real time through the DC-DC module according to the current working condition of the electric driving system, it is guaranteed that the electric driving system works in the optimal high-efficiency area within the full-load range, and therefore the working efficiency of the electric driving system is improved.
Description
technical field [0001] The invention relates to the technical field of control of an electric drive system of an electric vehicle, in particular to a method for optimally controlling DC bus voltage of a motor controller. Background technique [0002] Vehicle-mounted high-power high-voltage DC-DC modules are increasingly becoming an important part of electric vehicles. They are the key to more flexible acceleration, deceleration, energy recovery and other functions of electric vehicles. Because of the addition of high-voltage DC-DC modules, the motor controller The DC bus voltage can be flexibly adjusted to match the industrial control of motor operation, improve work efficiency, and make the entire electric drive system work in an optimal working state. [0003] In the current technology, the DC bus voltage of the motor controller is mainly divided into constant voltage control with DC-DC module and traditional control without DC-DC module. Establishing the dynamic relation...
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IPC IPC(8): H02P23/14H02P23/00H02P27/06H02M3/156B60L15/20
CPCH02P23/14H02P23/0077H02P27/06H02M3/156B60L15/20Y02T10/64Y02T10/72
Inventor 刘蕾张军仁张茨王强龙段锐
Owner HEFEI JUYI POWER SYST CO LTD