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drive unit

A driving device and driving force technology, applied in transmission control, electromechanical device, control drive, etc., can solve problems such as inability to ensure accuracy, easy deterioration of rotating motor control accuracy, and high temperature

Active Publication Date: 2017-09-08
AISIN AW CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, compared with sensors using Hall elements, shunt resistors have poor current detection accuracy and are easily affected by ambient temperature.
Therefore, when the shunt resistor is used simply for the purpose of product cost reduction, there is a possibility that the desired accuracy cannot be ensured for the drive control of the rotating electric machine (for example, the motor generators MG1 and MG2 in Patent Document 1). possibility
In particular, considering that the installation environment of the driving device is likely to be considerably higher than the installation environment of general electrified products, the control accuracy of the rotating electrical machine is likely to deteriorate when a shunt resistor is used.

Method used

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Embodiment Construction

[0048] Embodiments of the driving device of the present invention will be described with reference to the drawings. The drive device 1 of the present embodiment is a vehicle drive device (hybrid vehicle drive device) for driving a vehicle (hybrid vehicle) including both an internal combustion engine E and a rotary electric machine MG as drive force sources for wheels W. Specifically, the drive device 1 is configured as a drive device for a hybrid vehicle of a one-motor parallel system.

[0049] 1. Outline structure of the drive unit

[0050] Such as figure 1 As shown, the driving device 1 includes an input shaft I as an input member drivingly connected to an internal combustion engine E, an output shaft O as an output member drivingly connected to a wheel W, a rotating electric machine MG, and a transmission device TM. In addition, in the present embodiment, the drive device 1 includes a coupling device CL, a gear mechanism G, and a differential gear device DF. The engageme...

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Abstract

The present invention can lessen the influence on the control accuracy of the rotating electric machine and reduce the product cost. The present invention relates to a drive device (1) provided with an AC rotating machine (PM) and an inverter (40). A drive device (1) includes a shunt resistor that detects a current flowing through switching element units for each phase of an inverter (40). The AC rotary motor (PM) is drive-connected to the rotating body installed independently of the wheels (W), and the shunt resistor is arranged in the driving force source chamber (Q) that accommodates the driving force source (E).

Description

technical field [0001] The present invention relates to a drive device including a rotating electrical machine and an inverter connected between the rotating electrical machine and a DC power supply. Background technique [0002] As the drive device described above, a device described in JP 2007-166803 A (Patent Document 1) is known. In such an apparatus, in order to perform drive control of the rotating electric machines [motor generators MG1, MG2], it is necessary to install a current sensor for detecting the current flowing through the stator coils of each phase. Conventionally, as a current sensor used in a driving device, a sensor of a Hall element as disclosed in Patent Document 1 has been widely used. Sensors using Hall elements have relatively stable temperature characteristics and can detect current with high precision, so they are frequently used in driving devices that are prone to high-temperature environments for high-precision drive control of rotating electri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/06H02M7/48
CPCH02P5/74H02P27/06B60L15/025H02M7/003H02M7/53871H02M7/5395H02P6/18Y02T10/64H02M1/0009H02K11/27H02K11/33F15B11/08F15B2211/20515F15B2211/2053F16H61/0031F16H61/0265H02K5/22H02K11/0094H02P6/14H02P27/08B60W10/08B60W10/30H02M7/48H02M7/53875
Inventor 中尾惠子岩月健
Owner AISIN AW CO LTD
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