Polyspede

Our legendary OC2 series has been revamped with improved features and was launched in June 2002.
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OC2B is an open/closed chassis motor control that has been designed as building block solid state regulated power unit. OC2B uses state of the art control circuitry which can be used by itself, by wiring in the provided speed potentiometer as a straightforward speed regulated control or can be incorporated into much more sophisticated system designs contactor operation, external speed programming and tach feedback etc.

Comparison of Motors when using SCR and PWM Drives

Most Permanent Magnet (PM) motors were designed to be used with Silicon Controlled Rectifier (SCR) DC drives. With the advent of Pulse Width Modulated (PWM) drives, LIKE THE QDT SERIES, several things occur which allow the same motor to produce a higher Horse Power. This is a result of the form factor of a PWM drive being much less than that of a SCR DRIVE. The typical form factor for an SCR drive is 1.4 while the form factor for a PWM drives is less than 1.05. One of our Suppliers has prepared the following list of PM motors which we recommend when using our QDT series of drives. Notice the increase in horsepower when using PWM drives.

RATED HP FF1.4	FRAME	RATED RMP	RATED VOLTS	POLYSPEDE CATALOG NUMBER	RATEED HP 1.05 FF
¼	SS56C	1750	90	E25AMA-L	.40
¼	SS56C	1750	180	E25AMB-L	.50

1/3	SS56C	1750	90	E33AMA-L	.50
1/3	SS56C	1750	180	E33AMB-L	.50

½	SS56C	2500	90	E50AMA-L	.75
½	SS56C	2500	180	E50WMB-L	.70
½	SS56C	1750	90	E50AMA-L	.70
½	S56C	1750	180	E50AMB-L	.70

¾	SS56C	2500	90	E75AMA-L	1.00
¾	SS56C	2500	180	E75AMB-L	1.00
¾	SS56C	1700	90	E75AMA-L	1.00
¾	SS56C	1700	180	E75AMB-L	1.00

1	SS56C	2500	90	E100WMA-L	1.50
1	SS56C	2500	180	E100AMB-L	1.50
1	SS56C	1700	90	E100AMA-L	1.25
1	SS56C	1700	180	E100AMB-L	1.25

1.5	S56C	2500	90	E150WMB-L	2.00
1.2	S56C	1700	180	E150AMB-L	1.75
			90
2	S56C/145	2500	180	E200WMB-L	3.00

Diameter of an SS56C is 4.88" and a S56C is 5.61"

Volts/Hertz, Sensorless
Vector and Flux Vector
drives ranging
from 1/4 to 200 HP.

Non Regenerative
and Regenerative
drives from 1/6
to 500 HP.

AC motors from Baldor,
AO Smith, Lincoln,
Marathon and Reliance.

DC motors from Baldor
and AO Smith.