Inverter-charger integrated device for electric vehicle

• US 9,616,760 B2
• Filed: 09/05/2014
• Issued: 04/11/2017
• Est. Priority Date: 09/09/2013
• Status: Expired due to Fees

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: Yang, Chun Suk, Jang, Jae Hoon, Jang, Byung Woon, Jung, Joong Ki
• Primary Examiner(s): Santana, Eduardo Colon
• Assistant Examiner(s): Laughlin, Charles S
• Application Number:
  US14/478,872
• Publication Number:
  US 20150069936A1
• Time in Patent Office: 949 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 2210/30 AC to DC converters
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/24 Using the vehicle's propulsion converter for charging
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: B60L 58/40 for controlling a combination of batteries and fuel cells
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/40 Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

An inverter-charger integrated device for an electric vehicle is provided. The inverter-charger integrated device for the electric vehicle includes a motor; a power input unit; a rectifying unit; an inverter; and a control unit, wherein the inverter comprises a first group of switches including first and second switches, a second group of switches including third and fourth switches, and a third group of switches including fifth and sixth switches, the rectifying unit is directly connected to the first of the first to third groups of switches, and phases of the motor are respectively connected to the first to third group of switches.

Claims

1. An inverter-charger integrated device for an electric vehicle comprising:

a motor;

a power input unit to which alternating current (AC) power is applied;

a rectifying unit rectifying applied AC power and outputting rectified power, wherein the rectifying unit comprises a positive electrode and a negative electrode;

an inverter arranged between a single rectifying unit, which is the rectifying unit, and the battery, wherein the inverter supplies charging power for the charging of the battery by using power rectified through the rectifying unit in an first operating condition and supplies driving power for the driving of the motor by using power charged in the battery in a second operation condition; and

a control unit determining the operating condition of the inverter and operating the inverter according to a determined operating condition,

wherein the rectifying unit further comprises a rectifier including a plurality of diodes, and a power factor corrector including a transistor, an inductor, and a diode,

wherein the power factor corrector corrects the power factor of power rectified through the rectifier,

wherein the inverter comprises a first group of switches comprising first and second switches, a second group of switches comprising third and fourth switches, and a third group of switches comprising fifth and sixth switches,

wherein one end of the inductor is connected to an emitter of the transistor and to an end of the diode of the rectifying unit, and wherein the other end of the inductor is connected to the positive electrode of the rectifying unit which is connected between the first switch and the second switch of the first group of switches to provide rectified and power factored corrected power to a first phase of the motor,

the positive electrode of the rectifying unit is directly connected to the first group of switches and is not directly connected to either the second group of switches or the third group of switches, and wherein the negative electrode of the rectifying unit is directly connected to each of the first group of switches, the second group of switches, and the third group of switches, and

the first phase, a second phase, and a third phase of the motor are respectively connected to the first to third group of switches and wherein the inductor of the rectifier is not the same as the first, the second, or the third phases of the motor.

2. The inverter-charger integrated device according to claim 1, wherein the inverter is configured to:

operate only the first group of switches connected to the rectifying unit in the first operation condition, and

operate all the first to third groups of switches in the second operation condition.

3. The inverter-charger integrated device according to claim 1, wherein the control unit turns ON the transistor and the second switch for a first period and turns OFF the transistor and the second switch for a second period, in the first operation condition, and

the first switch maintains a turn-OFF state in the first operating condition and operates as a diode.

4. The inverter-charger integrated device according to claim 1, wherein the motor comprises any one of a Y-connected motor and a delta-connected motor.