DRIVE DEVICE AND ELECTRIC POWER STEERING DEVICE INCLUDING THE DRIVE DEVICE
First Claim
1. A drive device comprising:
- a rotating electric machine including a stator with a first winding group and a second winding group wound on the stator in at least three phases, a rotor rotatably disposed relative to the stator, and a shaft rotating with the rotor;
a substrate disposed on one axial end of the rotating electric machine;
a first drive element (i) arranged on one surface of the substrate in a first region and (ii) constituting a first inverter that switches a power supply to the first winding group;
a second drive element (i) arranged on a same surface of the substrate as the first drive element in a second region and (ii) constituting a second inverter that switches a power supply to the second winding group, the second region being symmetric to the first region relative to a shaft of the rotating electric machine;
a first extension line extending from each of the at least three phases of the first winding group to be connected to the substrate; and
a second extension line extending from each of the at least three phases of the second winding group to be connected to the substrate,wherein the first extension line and the first drive element, as well as the second extension line and the second drive element have respectively reversed phase orders in an arrangement of the phase orders from an end close to a reference position toward an other end of the arrangement.
1 Assignment
0 Petitions
Accused Products
Abstract
A drive device includes a rotating electric machine, a substrate, a first drive element, a second drive element, a first extension line, and a second extension line. The rotating electric machine including a stator with a first winding group and a second winding group wound on the stator in at least three phases. The first extension line and the first drive element, as well as the second extension line and the second drive element have respectively reversed phase orders in an arrangement of the phase orders from an end close to a reference position toward an other end of the arrangement. In such manner, variation of wiring lengths from an electric power supply region among different phases is reduced.
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Citations
12 Claims
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1. A drive device comprising:
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a rotating electric machine including a stator with a first winding group and a second winding group wound on the stator in at least three phases, a rotor rotatably disposed relative to the stator, and a shaft rotating with the rotor; a substrate disposed on one axial end of the rotating electric machine; a first drive element (i) arranged on one surface of the substrate in a first region and (ii) constituting a first inverter that switches a power supply to the first winding group; a second drive element (i) arranged on a same surface of the substrate as the first drive element in a second region and (ii) constituting a second inverter that switches a power supply to the second winding group, the second region being symmetric to the first region relative to a shaft of the rotating electric machine; a first extension line extending from each of the at least three phases of the first winding group to be connected to the substrate; and a second extension line extending from each of the at least three phases of the second winding group to be connected to the substrate, wherein the first extension line and the first drive element, as well as the second extension line and the second drive element have respectively reversed phase orders in an arrangement of the phase orders from an end close to a reference position toward an other end of the arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric power steering device comprising:
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a drive device comprising; a rotating electric machine including a stator with a first winding group and a second winding group wound on the stator in at least three phases, a rotor rotatably disposed relative to the stator, and a shaft rotating with the rotor; a substrate disposed on one axial end of the rotating electric machine; a first drive element (i) arranged on one surface of the substrate in a first region and (ii) constituting a first inverter that switches a power supply to the first winding group; a second drive element (i) arranged on a same surface of the substrate as the first drive element in a second region and (ii) constituting a second inverter that switches a power supply to the second winding group, the second region being symmetric to the first region relative to a shaft of the rotating electric machine; a first extension line extending from each of the at least three phases of the first winding group to be connected to the substrate; and a second extension line extending from each of the at least three phases of the second winding group to be connected to the substrate, wherein the first extension line and the first drive element as well as the second extension line and the second drive element have respectively reversed phase orders in an arrangement of the phase orders from an end close to a reference position toward an other end of the arrangement; and a power transmission part transmitting a torque that is output from the rotating electric machine to a drive object, wherein a steering operation of a steering wheel by a driver is assisted by the torque from the rotating electric machine, the torque being used for driving the drive object.
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Specification