DRIVING DEVICE

• US 20180257496A1
• Filed: 03/06/2018
• Published: 09/13/2018
• Est. Priority Date: 03/10/2017
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: ANDOH, Takahiro, TAGAWA, Yohsuke
• Granted Patent: US 10,668,817 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 15/007 Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 58/13 Maintaining the SoC within a determined range
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 7/14 for vehicles propelled by ac motors
• CPC Class Codes: B60L 7/16 for vehicles comprising converters between the power source and the motor
• CPC Class Codes: H02J 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/16 Regulation of the charging current or voltage by variation of field
• CPC Class Codes: H02M 3/1584 with a plurality of power processing stages connected in parallel
• CPC Class Codes: H02P 2201/07 DC-DC step-up or step-down converter inserted between the power supply and the inverter supplying the motor, e.g. to control voltage source fluctuations, to vary the motor speed general aspects of plural converters in cascade H02M
• CPC Class Codes: H02P 27/06 using dc to ac converters or inverters H02P27/05 takes precedence
• CPC Class Codes: H02P 27/08 with pulse width modulation
• CPC Class Codes: H02P 3/18 for stopping or slowing an ac motor
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 10/92 : Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles

Abstract

A driving device includes a motor; a power storage device; a first boost converter configured to exchange power by voltage conversion between a power storage device side and a motor side; a second boost converter connected to the first boost converter in parallel and configured to exchange power by voltage conversion between the power storage device side and the motor side; and an electronic control unit configured to control the first boost converter and the second boost converter. The electronic control unit controls the first boost converter and the second boost converter such that the loss of each of the first boost converter and the second boost converter is not minimized during an excessive power input in which power to be input to the power storage device from the motor side is greater than an input limit of the power storage device.

Claims

1. A driving device comprising:

a motor;

a power storage device;

a first boost converter configured to exchange power by voltage conversion between a power storage device side and a motor side;

a second boost converter connected to the first boost converter in parallel and configured to exchange power by voltage conversion between the power storage device side and the motor side; and

an electronic control unit configured to control the first boost converter and the second boost converter,

wherein the electronic control unit controls the first boost converter and the second boost converter such that a loss of each of the first boost converter and the second boost converter is not minimized during an excessive power input in which power to be input to the power storage device from the motor side is greater than an input limit of the power storage device.

2. The driving device according to claim 1, wherein, during the excessive power input, the electronic control unit controls one boost converter of the first boost converter and the second boost converter such that power is supplied from the motor side to the power storage device side, and controls the other boost converter of the first boost converter and the second boost converter such that power is supplied from the power storage device side to the motor side.

3. The driving device according to claim 2, wherein, during the excessive power input, the electronic control unit performs control such that the loss of each of the first boost converter and the second boost converter is maximized.

4. The driving device according to claim 2, wherein, during the excessive power input, the electronic control unit performs control such that power input to the power storage device is equal to or less than the input limit.

5. The driving device according to claim 2, wherein, during the excessive power input, the electronic control unit controls the first boost converter and the second boost converter such that the loss of each of the first boost converter and the second boost converter is greater than a minimum value of a loss of normal control.

6. The driving device according to claim 2, wherein the power input to the power storage device is power obtained by subtracting second power input to the other boost converter from first power output from the one boost converter.