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A range-extending device for electric vehicles based on internal combustion engine and hybrid excitation motor

A hybrid excitation motor and electric vehicle technology, applied to electric vehicles, hybrid vehicles, motor vehicles, etc., can solve the problem of slow response speed of power generation of range-extending devices, affecting overall machine emissions and fuel economy, motor boost inverse Variable control complexity and other issues, to achieve the effect of low cost, good fuel consumption and emissions, and less difficult control

Inactive Publication Date: 2019-07-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The permanent magnet synchronous motor relies on the permanent magnet to generate the air gap magnetic field required for electromechanical energy conversion. Once the motor is selected, the magnetic field strength generated by the permanent magnet is difficult to adjust flexibly, and the working speed of the internal combustion power generation range extender needs to follow the change of power generation demand Therefore, an additional output conditioning circuit is required to realize the adjustment of the output voltage, output current and power generation of the range extender, such as half-bridge rectification technology, PWM full-bridge rectification technology, bidirectional DC / DC, etc., resulting in higher control difficulty and control cost high
[0005] (2) Internal-combustion power generation range-extending devices usually need to perform frequent start-stops and switching of working conditions according to different power generation requirements. Although permanent magnet synchronous motors can use inverter technology to achieve high-idle start of the internal combustion engine of the range-extending device, reducing fuel consumption and emissions during the starting process, However, the field increase and field weakening based on the armature current vector control has great limitations and the motor boost inverter control is more complicated, so the adjustment of the target power generation condition of the range extender still needs to be realized by the transient control of the traditional internal combustion engine. Transient working conditions not only affect the emission and fuel economy of the whole machine, but also cause the response speed of the power generation of the range extender to slow down

Method used

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  • A range-extending device for electric vehicles based on internal combustion engine and hybrid excitation motor
  • A range-extending device for electric vehicles based on internal combustion engine and hybrid excitation motor
  • A range-extending device for electric vehicles based on internal combustion engine and hybrid excitation motor

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing.

[0021] The electric vehicle range extender based on the internal combustion engine and the hybrid excitation motor includes an internal combustion engine 8 , a hybrid excitation motor 7 , an uncontrolled rectifier 6 , an inverter 5 and a range extender controller 1 . The internal combustion engine 8 is mainly used for fuel combustion and thermal power conversion, converting fuel chemical energy into mechanical energy to drive the hybrid excitation motor 7 to generate electricity; the hybrid excitation motor 7 has both the functions of a starter motor and a generator, and is used for high-speed starting and after-starting of the range extender. high-efficiency power generation; the uncontrolled rectifier 6 is used to convert the alternating current generated by the hybrid excitation motor into direct current under the power generation condition of the range extender; the inve...

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Abstract

The invention discloses an electric automobile range increasing device based on an internal combustion engine and a mixed excitation motor. The strength of a magnetic field generated by a traditional range increasing device based on a permanent magnet synchronous motor is difficult to adjust flexibly, and machine emission and fuel economy need to be improved. The electric automobile range increasing device comprises the internal combustion engine, the mixed excitation motor, a non-controlled rectifier, an inverter and a range increasing device controller. The internal combustion engine and the mixed excitation motor are in coaxial mechanical direct connection. A three-phase terminal of the mixed excitation motor is connected with a vehicle direct current bus through the non-controlled rectifier and the inverter. In the starting mode, the mixed excitation motor is made to reversely tow the internal combustion engine by utilizing the invert technology and magnetic field weakening control so as to start the range increasing device; and in the electricity generation mode, the mixed excitation motor is driven by the internal combustion engine to supply the power needed by a vehicle in the state that a power battery is lack of electricity to a drive motor through the non-controlled rectifier, and surplus electricity energy is used for charging the battery.

Description

technical field [0001] The invention mainly relates to an electric vehicle range-extending device based on an internal combustion engine and a hybrid excitation motor, which belongs to the field of new energy vehicles and is mainly used for emergency power supply and on-board charging when the power battery of a new energy electric vehicle is depleted, so as to prolong the continuous driving of the electric vehicle range while reducing battery recharge wait time by filling up with fuel. Background technique [0002] Limited by the technical level and manufacturing cost of the current battery, the range-extended hybrid electric vehicle is one of the most ideal models for the transition from traditional vehicles to future pure electric vehicles. By adding a set of internal combustion engine power generation or fuel cell power generation devices to the traditional electric vehicle platform, the range-extended hybrid electric vehicle not only retains the characteristics of energ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L50/62B60L50/15
CPCB60L50/61Y02T10/62Y02T10/70Y02T10/7072Y02T10/72
Inventor 姚栋伟吴锋侯珏王涵张翀
Owner ZHEJIANG UNIV
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