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Electric drive apparatus

一种电传动、电动机的技术，应用在机电装置、电动组件、电气元件等方向，能够解决增加电导体阻抗、降低电容器性能、控制单元尺寸大等问题

Active Publication Date: 2011-11-23
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the case where capacitors and power modules are arranged in an L shape, the control unit needs to be large in size
The first bus bar connecting the capacitors to the power module increases the impedance of the electrical conductors and degrades the performance of the capacitors

Method used

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  • Electric drive apparatus
  • Electric drive apparatus
  • Electric drive apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0051] A transmission according to a first embodiment of the invention is shown in Figure 1 to Figure 17 and indicated by the number 1. The transmission 1 is applied to an electric power steering system (referred to as EPS) of a vehicle.

[0052] First refer to figure 1 Describe the electrical configuration of the EPS. The electrical configurations described hereinafter can be applied to other embodiments. Such as figure 1As shown in , the electric transmission 1 is used to drive the column 6 through a gear 7 attached to the column 6 (rotation shaft of the steering wheel 5 ) to generate rotational torque to assist the steering operation of the steering wheel 5 of the vehicle. Specifically, when the driver operates the steering wheel 5, the electric transmission 1 assists the driver in the steering operation of the steering wheel 5 by detecting the steering torque generated in the column shaft 6 and acquiring vehicle speed information from CAN (Control Area Network), not s...

no. 2 example

[0104] Figures 21 to 29 shows an electric transmission according to a second embodiment of the invention. According to the second embodiment, the heat sink 250 has two heat radiation blocks 251 . Two module units 260 and 270 are provided for each of the heat radiation blocks 251 . That is, four module units 260 and 270 are installed on the heat sink 250 .

[0105]One module unit 260 is arranged on the top outer wall of the heat radiation block 251 on the side of the power circuit substrate 70 . Another module unit 270 is arranged on the side outer wall of the heat radiation block 251 . That is, the semiconductor module unit 260 is arranged generally perpendicular to the rotation center of the shaft 35 , and the semiconductor module unit 270 is arranged generally parallel to the rotation center of the shaft 35 .

[0106] The semiconductor module units 260 and 270 have four semiconductor modules 261 to 264 and 271 to 274 and metal substrates 265 and 275 , respectively. The...

no. 3 example

[0119] Figure 30 to Figure 33 shows an electric transmission according to a third embodiment of the invention. This embodiment is a modification of the first embodiment.

[0120] According to the third embodiment, the first smoothing capacitor 77, the second smoothing capacitor 78, and the choke coil 76 are arranged differently from the first embodiment. These large-sized electronic parts are arranged such that the first smoothing capacitor 77 , the choke coil 76 and the second smoothing capacitor 78 are arranged in this order on the power circuit substrate 70 from the power circuit connector 79 side. The second smoothing capacitor 78 is arranged such that an imaginary line Z connecting the axes of the second smoothing capacitor 78 forms a square shape when viewed in the axial direction from one axial side of the shaft 35 .

[0121] Figure 31 to Figure 33 The conductors formed in the power circuit substrate 70 are shown in . Figure 31 The conductor patterns of the fourt...

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PUM

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Abstract

Two power modules, in which switching elements for switching over currents supplied to coils of a motor are resin-molded, are provided to face each other sandwiching a plane including a rotation axis of a shaft. A first smoothing capacitor, second smoothing capacitors and a choke coil are located between the power modules. By consolidating large-sized electronic parts between the power modules, a control unit can be reduced in size and impedance of electric conductor connecting the electronic parts and the power modules can be reduced.

Description

technical field [0001] The invention relates to an electric drive and an electric motor with an electronic control unit for controlling the drive of the electric motor. Background technique [0002] In some conventional electric transmissions of an electric power steering system for assisting a driver's steering operation, an electronic control unit is combined with an electric motor. The control unit of the electric transmission is required to be compact in size, low in noise and effectively increase the output torque of the electric motor. [0003] According to the following Patent Documents 1 and 2, three capacitors that smooth changes in input power supply voltage are arranged in a row. In addition, six power modules are located in parallel in two rows. A row of three capacitors and a row of six power modules are arranged in an L shape. Current supplied from the power source flows from the first bus to the power module and the second bus through the capacitor. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K11/00
CPCH02K11/0073H02K11/33
Inventor 宫地修平山崎雅志安部达也
Owner DENSO CORP
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