ELECTRICALLY POWERED VEHICLE, CONTROL DEVICE FOR ELECTRICALLY POWERED VEHICLE, AND COMPUTER READABLE MEDIUM

• US 20100116575A1
• Filed: 11/10/2009
• Published: 05/13/2010
• Est. Priority Date: 11/11/2008
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hamatani, Takashi, Nozawa, Natsuki
• Granted Patent: US 8,091,666 B2
• Time in Patent Office: Days
• US Class Current: 180/65.285
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2510/081 Speed
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2710/0644 Engine speed
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/081 Speed
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 30/1884 Avoiding stall or overspeed of the engine
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

An electrically powered vehicle includes: a boost converter that boosts a power supply voltage and outputs a boosted voltage; an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel; and a control device that performs control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both an accelerator and a brake are not operated to be on.

Claims

1. An electrically powered vehicle comprising:

a boost converter that boosts a power supply voltage and outputs a boosted voltage;

an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel; and

a control device that performs control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both an accelerator and a brake are not operated to be on.

2. An electrically powered vehicle comprising:

a boost converter that boosts a power supply voltage and outputs a boosted voltage;

an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel; and

a control device that performs control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and a parking brake is operated to be on.

3. An electrically powered vehicle comprising:

an internal combustion engine;

a first rotating electric machine;

a power distribution mechanism that distributes power produced by the internal combustion engine to the first rotating electric machine and wheels;

a second rotating electric machine that applies driving force to the wheels;

a boost converter that boosts a power supply voltage and outputs a boosted voltage;

a first inverter that receives the boosted voltage from the boost converter and controls the first rotating electric machine;

a second inverter that receives the boosted voltage from the boost converter and controls the second rotating electric machine; and

a control device that performs control to limit the boosted voltage when it is determined that the second rotating electric machine is in a locked state and both of an accelerator and a brake are not operated to be on.

4. An electrically powered vehicle comprising:

an internal combustion engine;

a first rotating electric machine;

a power distribution mechanism that distributes power produced by the internal combustion engine to the first rotating electric machine and wheels;

a second rotating electric machine that applies driving force to the wheels;

a boost converter that boosts a power supply voltage and outputs a boosted voltage;

a first inverter that receives the boosted voltage from the boost converter and controls the first rotating electric machine;

a second inverter that receives the boosted voltage from the boost converter and controls the second rotating electric machine; and

a control device that performs control to limit the boosted voltage when it is determined that the second rotating electric machine is in a locked state and a parking brake is operated to be on.