SYNCHRO-SYM VIDEO

 

 

- Real Innovation For Our Energy Future -

 

- PURCHASING -

 

SS-EMS-500T

[400KW SS-EMS For Electric Vehicles]

 

[High Performance SS-EMS For The Teslamotors' Electric Vehicles]

 

For our Hot Rod enthusiast who are lucky enough to own a Teslamotors Roadstar or Model S, BEM is specifically developing the SS-EMS-500T as a high performance electric machine system (EMS) replacement for Teslamotors' induction electric motor/generator system (I-EMS) [for instance] with the superior Synchro-Sym electric machine system (SS-EMS) technology, which is a self-contained turn-key electric motor or generator system (all within a smaller 10" (246mm) diameter by 5" (126mm) long by 34lb (16Kg) and more efficient package that includes the integral brushless real time electronic controller). Also with the higher overall efficiency, SS-EMS-500T replacement should improve battery range. Consult the following table for the SS-EMS-500T specifications, which show nearly double the Roadster (or Model S) Induction EMS (I-EMS) performance with a comparison provided here. [1]   Note: The Roadster incorporates one I-EMS and as a result, one SS-EMS-500T is required per Roadster; and the Model S incorporates two I-EMS and as a result, two SS-EMS-500T are required per Model S.

 

BEST ELECTRIC MACHINE

SYNCHRO-SYM Axial-Flux (or disk shape) Amorphous Core Electric Machine System

[SS-EMS-500T] [2] [3]

 

 

Power (KW)

Constant-Torque

Speed (RPM)

Port Volt (V)

 

SS-EMS Power 

@ Constant-Torque Speed Range

50.00

[4]

0 - 5400 (+)

 

≈ 375 [5]

 

Operation Above 5400 RPM enters the constant horsepower speed range.

SS-EMS Peak Power

@ 4X Constant-Torque

200.00

[4]

SS-EMS Power 

@ 8X Constant-Torque

400.00

[4]

Parameter

SI Units

 

Values

Comments and Descriptions

 

 

 

 

 

Poles

 

 

8.00

 

 

 

 

 

 

Torque

N-M

 

88.46

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

ft-lb

 

65.25

Peak Torque
@ 8X TORQUE

N-M

 

707.71

ft-lb

 

522.01

 

 

 

 

 

Power

KW

 

50.00

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

HP

 

67

Peak Power
@ 8X TORQUE

KW

 

400.00

HP

 

536.00

 

 

 

 

 

Power Density

KW/L

 

22.08

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

Power Density
@ 8X TORQUE

KW/L

 

176.64

 

 

 

 

 

Specific Power

Kw/kg

 

3.82

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

Specific Power
@ 8X TORQUE

Kw/kg

 

30.57

 

 

 

 

 

SS-EMS Efficiency [6]

%

 

94.0

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

 

SS-EMS Efficiency [6]

@ 4X TORQUE

%

 

88.6

SS-EMS Efficiency [6]

@ 8X TORQUE

%

 

59.1

CORE OD (/w end windings)

ft

 

0.77

 

mm

 

233.36

inches

 

9.19

Total CORE Depth

mm

 

52.97

 

inches

 

2.09

TOTAL "CORE" WEIGHT & HFRT

lb

 

26.43

 

Kg

 

13.09

TOTAL OD

ft

 

0.8

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

mm

 

245.03

inches

 

9.65

TOTAL Length

mm

 

125.53

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

inches

 

4.94

TOTAL WEIGHT       

lb

 

33.96

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

Kg

 

16.81

 

 

 

 

 

Inner Axle Outside Diameter

mm

 

35.00

 

inches

 

1.38

ft

 

0.11

 

 

 

 

 

Temperature Rise [7]

Seconds

 

101.29

Ambient without active cooling

and at stall speed [7]

 

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

Temperature Rise

@ 4X Torque [7]

Seconds

 

7.17

 

Ambient without active cooling

and at stall speed [7]

 

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

Temperature Rise

@ 8X Torque [7]

Seconds

 

1.84

Ambient without active cooling

and at stall speed [7]

 

INTEGRATED

ELECTRONIC CONTROLLER INCLUDED

 

 

 

 

 

 

 


[1] Best Electric Machine designed the SS-EMS-500-T with our Best Electric Machine Computer Aided Design tool (BEM-CAD) based on approximate dimensions extrapolated from online images of Teslamotors induction motor. There are additional design requirements that have not been vetted, such as the compatible mounting frame, etc.

[2] Given the availability of materials, our intention is to manufacture amorphous metal cores or at least thin magnetic ribbon cores.

[3] Best Electric Machine Computer Aided Design tool (BEM-CAD) has been verified, which includes verification against existing electric machine systems, such as the Roadster's Induction Electric Machine System.  Although always outperforming cost-performance of any other electric machine system, some parameters of the production SS-EMS may vary upto 20% from the initial parameters calculated with BEM-CAD because of material substitution (e.g., to reduce cost), design compensation for cooling restrictions, etc.

[4] BEM chose the SS-EMS-500T size because the larger size offers better standalone cooling potential at stall (i.e., zero) speed and ambient temperature.

[5] Port Voltage is based on the Roadster battery voltage as the de facto voltage for EV(s).

[6] SS-EMS-500T efficiency includes electronic controller, core, and electrical losses but does not include friction losses or active cooling.

[7] Because of the symmetrical dual-ported transformer circuit topology, only SS-EMS can achieve maximum torque of more than eight times constant-torque.   But like any electric machine system operating at peak torque during EV acceleration or deceleration (for instance), efficiency is reduced under high current or maximum torque with the expectant temperature rise.  For equitable comparison with the competition, the 25o temperature rise time from ambient of 50o C without cooling and at stall speed with maximum torque is given. In consideration, a compact, low pressure, high efficiency active droplet cooling method based on variable ultrasonic nebulizer and variable speed blower combination is available from BEM that provides continuous operation at any torque.

 


[HOME]                   [Contact]

Note: The Radial Flux prototyping of the Advanced Brushless Wound-Rotor Synchronous Doubly-Fed Electric Motor Or Generator System is shown as our Icon, which predates the axial-flux SS-EMS Technology.

 

Best Electric Machine
Welcomes your comments, suggestions, or collaborative interest!

 

motorAgent@BestElectricMachine.com

2007, 2009, 2014  Best Electric Machine