Development Outline of

K&E POWER MOTOR

for EV新EV用モータの開発概要

Disclosure Document公開用資料

1

【INTRODUCTION】

Breakthrough Motor Design

Development Purpose

K&E (Kinetic & Electric) Power Motor has innovative structure and enable high efficiency conservation of kinetic energy with advanced KERS(Kinetic Energy-Recovery System) for EV/PHV drive motor

By rotating the stator coil side, accumulating kinetic energy at vehicle body side Kinetic energy + Electric motor output enable high power high efficiency (low power consumption) at a time of restarting

【K＆E Power Motor Operation Outline】

Innovative Structure: Rotor and Stator rotate in the same directionbyname; "Double Rotor Motor" or "Rotating Stator Motor"

Accumulating Kinetic Energy

High Efficiency Regeneration

Reduce Counter

Electromotive Force

Reactance

2. Regeneration (Slowdown/stop)

Rotate Stator

1. Normal Travelling

Rotate Rotor

3. Restarting

Rotate Rotor + Stator

RotorStator

①＜Parking State＞ ②＜Starting＞ ③＜Breaking/Regeneration＞

④＜Stopping/Idling＞ ⑤＜Restarting＞ ⑥＜Constant Speed Running＞

【K＆E Power Motor Condition of Operation】

Stator Stator Stator

StatorStatorStator

Rotor Rotor Rotor

RotorRotorRotor SB SB

SBSBSB

SB

SB: Secondary Battery

Regeneration by kinetic energy letting a stator rotate as a flywheel without converting to the electric energy causes;

1. Compare to the existing IPM or Induction motor for EV/HEV;i) Enable 2 - 2.5 times distance-to-empty by using the existing batteryii) or Enable EV motor output doublediii) Robust, compact size and light weight structure make lower mfg cost

2. At when a rotor and a stator rotate in parallel direction, by restraining the increasing of induced counter electromotive force (or reactance) without weak field control, causes better electric efficiency

3. Less charge/discharge cycle makes battery life longer

4. Regeneration without electrical energy conversion reduce conversion loss and

trim away complex system for regeneration control

【The Characteristics of K＆E Power Motor】

《Applied for International Patent (PCT) in 2019, May》

【K＆E Power Motor Comparison Table】Newly Developed AC Motor Synchronous Motor

K&E POWER MOTOR Induct ion MotorInterior Permanent Magnet

System Motor (IPM)

Neodymium Magnet A, N/A either is f ine Not Available Available

Energy Recovery ✔✔✔ ✔✔ ✔✔

Control Inverter Inverter Inverter

Durability High (in test ing) High High

Motor Weight Light Heavy Heavy

Cost Low Low High

Output Motor + Stored Energy Composition Motor Only Motor Only

On-Board

Cooling MethodAir-Cooling available (in test ing) Water-Cooling Water-Cooling

Energy Re-use Effic iency 90 % about 30 % about 30%

Energy Storage System Available Not Available Not Available

Aspects

(Issues)

- No on-board practical experiment yet

- backward gear needed due to the fixed

rotating direction

- Low efficiency at low-speed

range

- Big rotor loss

- Durable

- Low cost

- Neodymium Magnet Issue- Expensive

- High Performance

Pract ical Experience N/A T e sla (Brushless DC Motor for model 3) Auto ma ke rs (Nissan, Toyota, etc.)

Special NotesInduction motor recommended.

Also available for IPM Motor

Tesla Dual Motor Type

Rear(main): AC Induction Motor

Front: DC Brushless

Current Typical motor

【Prototype Version #4 Three-phase AC Induction Motor】

●Base Model: Mitsubishi Electric 22Kw

【Output Energy Ratio / Recovery Efficiency】

Theoretical Vehicle Kinetic Energy Recovery Ratio/Time ChartTheoretical N-T Chart

Rated

Torque

BACK INDUCED

ELECTROMOTIVE

FORCE

Elec. Energy 1

Regen. Energy 4

Middle Point

Output

Torque

Shaft Rotation (N)

Outp

ut

Shaft

Torq

ue (

T)

Rotator Side Rotation Nc

Rotator Output

Rated Output

Rotator Cut Off E

(by Inverter Control)

Recovery

Filling Factor

Recovery

Time5 hr.5 min.5 Sec.

Rotator (Stator) Filling Curve Battery Filling Curve

y = (sin h) ・ V

Sine Curve

y = (a・x・x) ・ E

Quadratic Curve