Electric vehicle battery unit on-off and motor drive system and its control method

A technology for battery cells and electric vehicles, which is applied in electric vehicles, battery circuit devices, and control drives, etc., can solve the problems of complicated methods and links for changing frequency and voltage.

Active Publication Date: 2017-06-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of changing the pulse width in DC speed regulation and changing the frequency and voltage in AC speed regulation is complicated

Method used

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  • Electric vehicle battery unit on-off and motor drive system and its control method
  • Electric vehicle battery unit on-off and motor drive system and its control method
  • Electric vehicle battery unit on-off and motor drive system and its control method

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Embodiment Construction

[0058] In order to enable the examiner to further understand the structure, features and other purposes of the present invention, the attached preferred embodiments are attached with accompanying drawings in detail as follows. The embodiments illustrated in the accompanying drawings are only used to illustrate the technical solution of the present invention , not to limit the present invention.

[0059] See figure 1 , figure 1 It is a basic composition block diagram of the electric vehicle motor drive system corresponding to the present invention. Such as figure 1 As shown, the battery pack unit connection system of the present invention includes a motor 2 , a battery pack 1 , a sensor 3 and a controller 4 . Among them, the battery pack 1 includes a plurality of battery cells 5 and a solid-state relay 6 between the connecting lines. The polarity of the output of each battery unit 5 at the A and B terminals, and control the output voltage signal at the A and B terminals wit...

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Abstract

The invention provides an electric automobile battery pack unit on-off and motor drive system and a control method thereof. A battery pack unit connection system comprises a motor, a battery pack, a sensor and a controller. A power converter between the battery pack and the motor is omitted, corresponding voltage signals are obtained by controlling a battery pack unit, action is directly conducted on the motor, and the energy loss is reduced; the battery output voltage can be controlled and changed; especially in an alternating-current motor, the voltage regulating function and the frequency regulating function can be achieved by controlling a solid relay according to the conditions, and the control type can be simplified.

Description

technical field [0001] The invention relates to a motor driving system and a control method thereof, which obtain the voltage signal required for driving the motor by switching between battery pack units of the electric vehicle, and belong to the driving control system of the electric vehicle. Background technique [0002] At present, for an electric vehicle, its motor drive system is mainly composed of a motor, a power converter, a controller, various detection sensors, and a power supply (battery). The motor can be selected according to the type of DC, AC, permanent magnet brushless or switched reluctance. According to the type of motor selected, the power converter has the form of DC / DC power converter, DC / AC power converter, etc. Its function is to convert the direct current of the battery into direct current of the corresponding voltage level according to the driving current requirements of the selected motor. AC or pulse power supply. Various detection sensors mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18B60L15/00H02J7/00
CPCY02T10/70
Inventor 王震坡孙培坤
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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