# US 12,224,650 B2 · Drive system having an induction generator with a main winding and auxiliary winding > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,650 B2 - Document ID: US12224650B2 - Status: Granted - Kind: B2 - Application number: 18/012,349 - Filed: 2021-05-20 - Published: 2023-08-10 - Granted: 2025-02-11 - Earliest claimed: 2020-07-28 - Assignees: Hitachi Construction Machinery Co., Ltd. - Applicants: Hitachi Construction Machinery Co., Ltd. - Inventors: Kazuo Nishihama; Masatoshi Yoshimura; Toshihiko Watanabe; Toshihiko Ishida; Seiji Ishida - Web page: https://patentgrep.com/patent/US12224650B2 ## CPC - H02K 7/1807: {Rotary generators (H02K7/006 takes precedence)} - H02K 17/42: Asynchronous induction generators (H02K17/02 takes precedence) - B60L 50/51: characterised by AC-motors - F02N 11/04: the motors being associated with current generators - H02K 1/16: Stator cores with slots for windings - H02K 1/165: {Shape, form or location of the slots} - H02K 1/26: Rotor cores with slots for windings - H02K 3/12: arranged in slots - H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) - H02K 3/34: between conductors or between conductor and core, e.g. slot insulation - H02P 5/74: controlling two or more AC dynamo-electric motors (H02P5/46, H02P5/60 take precedence) - H02P 9/48: Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle (H02P9/04 - H02P9/46 take precedence) - H02P 27/06: using DC to AC converters or inverters (H02P27/05 takes precedence) - H02P 2103/10: of the asynchronous type - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ## 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 3) 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. ### Claim 5 (depends on 1) The drive system according to claim 1, wherein the main winding and the auxiliary winding are arranged at equal distances from the secondary conductor.