Drive system having an induction generator with a main winding and auxiliary winding

Patent metadata

Field	Value
Publication number	US-12224650-B2
Application number	US-202118012349-A
Country	US
Kind code	B2
Filing date	May 20, 2021
Priority date	Jul 28, 2020
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

An object of the present invention is to provide a drive system that is provided with an induction generator having a primary winding including a main winding and an auxiliary winding and a secondary conductor, can vary the voltage of the main winding, and can increase the maximum output power of the auxiliary winding. Therefore, provided is a drive system, which is provided with an induction generator having a primary winding including a main winding and an auxiliary winding and a secondary conductor, including: a starting battery that starts the induction generator; a traction inverter that drives a traction motor; an auxiliary device inverter that drives an auxiliary device motor; a rectifier the input side of which is connected to the main winding and the output side of which is connected to the traction inverter; and a power generation inverter the output side of which is connected to the auxiliary winding and the input side of which is connected to the auxiliary device inverter and the starting battery.

First claim

The invention claimed is:

1. A drive system provided with an induction generator having a primary winding including a main winding and an auxiliary winding and a secondary conductor, the drive system comprising:
a starting battery that starts the induction generator;
a traction inverter that drives a traction motor;
an auxiliary device inverter that drives an auxiliary device motor;
a rectifier an input side of which is connected to the main winding and an output side of which is connected to the traction inverter; and
a power generation inverter an output side of which is connected to the auxiliary winding and an input side of which is connected to the auxiliary device inverter and the starting battery.

2. The drive system according to claim 1 , wherein
a maximum value of a ratio of required electric power of the auxiliary device inverter to output electric power of the auxiliary winding is larger than a maximum value of a ratio of required electric power of the traction inverter to output electric power of the main winding, and
the auxiliary winding is arranged at a position closer to the secondary conductor than the main winding.

3. The drive system according to claim 1 , wherein
a maximum value of a ratio of required electric power of the traction inverter to output electric power of the main winding is larger than a maximum value of a ratio of required electric power of the auxiliary device inverter to output electric power of the auxiliary winding, and
the main winding is arranged at a position closer to the secondary conductor than the auxiliary winding.

4. The drive system according to claim 3 , wherein
a stator iron core having a stator slot in which the primary winding is installed and
a rotor iron core having a rotor slot in which the secondary conductor is installed are provided,
the stator slot has a stator iron core projecting part formed to project between the auxiliary winding and the main winding, and
an insulator is installed between the stator iron core projecting part and the main winding.

5. The drive system according to claim 1 , wherein
the main winding and the auxiliary winding are arranged at equal distances from the secondary conductor.

Assignees

• Hitachi Construction Mach Co

Inventors

• Nishihama Kazuo
• Yoshimura Masatoshi
• Watanabe Toshihiko
• Ishida Toshihiko
• Ishida Seiji

Classifications

• H02P27/06

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• H02K3/34

  between conductors or between conductor and core, e.g. slot insulation · CPC title

• H02K1/26

  Rotor cores with slots for windings · CPC title

• H02K1/16

  Stator cores with slots for windings · CPC title

• B60L50/51

  characterised by AC-motors · CPC title