# US 10,245,971 B2 · Motor-generator system

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- Number: US 10,245,971 B2
- Document ID: US10245971B2
- Status: Granted
- Kind: B2
- Application number: 15/451,052
- Filed: 2017-03-06
- Published: 2018-09-06
- Granted: 2019-04-02
- Earliest claimed: 2017-03-06
- Assignees: The Gates Corporation
- Applicants: Gates Corporation
- Inventors: Keming Liu
- Web page: https://patentgrep.com/patent/US10245971B2

## CPC

- B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L 15/007: {Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles}
- B60L 50/16: with provision for separate direct mechanical propulsion
- F02B 67/06: driven by means of chains, belts, or like endless members
- F02D 31/001: {Electric control of rotation speed}
- F02D 41/062: {for starting (F02D41/061 takes precedence)}
- F02N 11/04: the motors being associated with current generators
- F02N 15/08: the gearing being of friction type
- H02P 29/40: Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
- F02D 2200/101: Engine speed
- F02D 2250/24: by using an external load, e.g. a generator
- Y02T 10/72: Electric energy management in electromobility
- 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
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A motor-generator system comprising an internal combustion engine, a motor-generator in driven engagement with the internal combustion engine by an endless belt, the motor-generator, a controller detecting a speed signal of the internal combustion engine, a driver input signal, a battery state signal and a motor-generator signal, the motor-generator operable to provide a motoring torque or a load torque to the internal combustion engine at a predetermined frequency according to a controller command, and the controller controlling the motor-generator torque at a frequency greater than 1 Hz such that when the internal combustion engine accelerates the motoring torque is applied to speed the motor-generator rotation and when the internal combustion engine decelerates the load torque is applied to slow motor-generator rotation such that motor-generator rotation is controlled to attenuate a system vibration.

## Claims

### Claim 1

A motor-generator system comprising:
an internal combustion engine;
a motor-generator in driven engagement with the internal combustion engine by an endless belt, the motor-generator comprising;
a controller detecting a speed signal of the internal combustion engine, a driver input signal, a battery state signal and a motor-generator signal;
the motor-generator operable to provide a motoring torque or a load torque to the internal combustion engine at a predetermined frequency of rotary vibration according to a controller command; and
the controller controlling the motor-generator torque at a frequency greater than 1 Hz such that when the internal combustion engine accelerates, the motoring torque is applied to speed the motor-generator rotation, and when the internal combustion engine decelerates, the load torque is applied to slow motor-generator rotation such that motor-generator rotation is controlled to attenuate a system vibration.

### Claim 2 (depends on 1)

The motor-generator system as in claim 1 further comprising a tensioner engaging two spans of the endless belt.

### Claim 3 (depends on 2)

The motor-generator system as in claim 2, wherein the coupled tensioner is mounted to the motor-generator.

### Claim 4 (depends on 1)

The motor-generator system as in claim 1, wherein the controller also receives a throttle position signal.

### Claim 5 (depends on 1)

The motor-generator system as in claim 1, wherein the frequency is less than approximately 50 Hz.

### Claim 6 (depends on 1)

The motor-generator system as in claim 1 wherein the frequency is less than approximately 30 Hz.