Motor drive
AssigneeMeidensha Corporation
InventorsToru Kakebayashi, Takashi Yamaguchi, Yugo Tadano
Life of this patent
Estimating the term…
Abstract
[Task] A high-speed driving is possible, a utilization of a power supply having a low voltage is possible, and a regeneration is easy to be carried out. [Means to solve the task] A first buck-boost chopper portion is provided on an output side of a battery 10 to boost a voltage across battery 10 during a drive of a motor, a second buck-boost chopper portion is provided on an output side of the first buck-boost chopper portion to boost the voltage from an inverter portion 20 during a regeneration, inverter portion 20 of a 120-degree conduction current source inverter is provided on the output side of the second buck-boost chopper portion, and a motor 38 is provided on an output side of inverter portion 20.
Claims6
A motor drive comprising:
- a direct current power supply;
- a first buck-boost chopper portion which boosts a voltage of the direct current power supply to provide a direct current power of an inverter portion during a time at which a motor is driven;
- and
- a second buck-boost chopper portion configured to boost the direct current voltage of the inverter portion to regenerate a power to the direct current power supply during a time of a regeneration of the motor,
- the inverter portion being a 120-degree conduction current source inverter and being configured to convert the direct current power of the inverter portion into a multi-phase alternating current power to drive the motor and to convert the multi-phase alternating power into the direct current power to regenerate an electrical power of the motor, and a diode having an anode connected between a reactor of the second buck-boost chopper portion and a direct current positive side of the inverter portion, having a cathode connected to a positive side of a capacitor of the second buck-boost chopper portion, and suppressing a voltage rise in the inverter portion during a gate turn off of the inverter portion.
A motor drive comprising:
- a first buck-boost chopper portion configured to boost a voltage of an electrically connected external direct current power supply to provide a direct current power of an inverter portion during a time at which a motor is driven;
- and
- a second buck-boost chopper portion configured to boost the direct current voltage of the inverter portion to regenerate a power to the external direct current power supply during a regeneration of the motor, the inverter portion being a 120-degree conduction current source inverter and being configured to convert a direct current power of the inverter portion into a multi-phase alternating current power to drive the motor and to convert the multi-phase alternating power into the direct current power to regenerate an electric power of the motor, and a diode having an anode connected between a reactor of the second buck-boost chopper portion and a direct current positive side of the inverter portion, having a cathode connected to a positive side of a capacitor of the second buck-boost chopper portion, and suppressing a voltage rise in the inverter portion during a gate turn off of the inverter portion.
Dependencies are inferred from the claim text.