Speed control method for SR (Switched Reluctance) motor of electric vehicle
A technology of electric vehicles and control methods, which is applied in the direction of electric vehicles, control drives, electric traction, etc., to achieve high efficiency
Active Publication Date: 2013-12-18
众泰新能源汽车有限公司
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[0005] In order to overcome the shortcomings of the existing electric vehicle SR motor speed regulation technology that cannot obtain higher efficiency in both low-speed and high-speed sections, the present invention provides an electric vehicle SR that can achieve higher efficiency in both low-speed and high-speed sections. motor speed control method
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] refer to Figure 1~Figure 3 , an electric vehicle SR motor speed regulation control method, in the speed regulation control method, the SR motor is powered by a battery pack, the battery pack includes 2N batteries, N is a positive integer, and the 2N batteries are connected in series and parallel to realize m The voltage levels of each level are U1, U2, ..., Um from low to high, and m is a natural number greater than or equal to 2. Among them, the lowest level of voltage U1 is the rated voltage U of a single battery, and the highest level of voltage Um is 2NU , the constraints of the series-parallel connection are: the operating conditions of each storage battery are the same, and the switching between different voltage levels is realized through the adjustment of the contactor; the rated speed of the SR motor of the electric vehicle is set to m-1 adjustments P...
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The invention relates to a speed control method for an SR (Switched Reluctance) motor of an electric vehicle. In the speed control method, the SR motor is supplied with power through a storage battery pack, the storage battery pack comprises 2N storage batteries, the 2N storage batteries are connected in series and parallel to realize m voltage classes, the operating condition of all storage batteries is the same and the switching among different voltage classes is realized by adjusting contactors. The rated revolving speed of the motor is set to have m-1 voltage regulating speed nodes, i.e. sequentially V1, V2, V3 ellipsis Vm-1 from low to high. When the revolving speed is lower than V1, the supply voltage of the storage battery pack is controlled to be U1; when the revolving speed is not lower than V1 and is lower than V2, the supply voltage of the storage battery pack is controlled to be U2; and so forth, when the revolving speed is not lower than Vm-1, the supply voltage is controlled to be Um. The speed control method for the SR (Switched Reluctance) motor of the electric vehicle has the advantage that higher efficiency can be realized at both low-speed sections and high-speed sections.
Description
technical field [0001] The invention relates to the technical field of speed regulation of an SR motor of an electric vehicle, in particular to a speed regulation control method of an SR motor of an electric vehicle. Background technique [0002] With the deepening of energy conservation and emission reduction, electric vehicles have been recognized as energy-saving and environmentally friendly future vehicles. However, any type of electric vehicle including fuel cells, hybrid power or pure electric vehicles needs to use the motor as an actuator to drive the wheels. Therefore, how to give full play to the advantages of the motor and choose a better drive structure for the promotion and application of electric vehicles Significant. Based on multiple theoretical analyzes of vehicle dynamics, motor drive and automatic control engineering, the use of in-wheel motors to directly drive electric vehicles can summarize the following advantages: Simplify the mechanical structure and...
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Login to View More IPC IPC(8): B60L11/18B60L15/20
CPCY02T10/70Y02T10/72
Inventor 王贵明董炜江张华张晓
Owner 众泰新能源汽车有限公司