Unipolar/Bipolar Connections (2-Phase Motors)

Publish Time: 2018-01-11 Origin: Site

Connections	Resistance (Ohms)	Inductance (mH)	Current (A)	Voltage (V)	Holding Torque (oz-in)
Unipolar	Same as Catalog	Same as Catalog	Same as Catalog	Same as Catalog	Same as Catalog
Bipolar Series	Catalog X 2	Catalog X 4	Catalog X 0.707	Catalog X 1.414	Catalog X 1.414
Bipolar Half Coil	Same as Catalog	Same as Catalog	Same as Catalog	Same as Catalog	Same as Catalog
Bipolar Parallel	Catalog X 0.5	Same as Catalog	Catalog X 1.414	Catalog X 0.707	Catalog X 1.414
Customer'sDriver	Motor Choices	What to Do	How to Do It		End Result
Unipolar (6 Leads)	6 Lead Motor	Use as is (Unipolar)			6 Leads
Bipolar (4 Leads)	8 Lead Motor	Convert to Unipolar	Tie yellow and orange together and use AND Tie white and brown together and use		6 Leads
	6 Lead Motor	Convert to Series	Tape off yellow and white leads and don't use		4 Leads
	6 Lead Motor	Convert to Half Coil	Tape off black and red leads OR Tape off green and blue leads		4 Leads
	8 Lead Motor	Convert to Series	Connect yellow and orange and tape off AND Connect white and brown and tape off		4 Leads
		Convert to Parallel	Tie black and orange together AND Tie yellow and green together AND Tie red and brown together AND Tie white and blue together		4 Leads
		Convert to Half Coil	Tape off black, yellow, red, and white OR Tape off orange, green, brown, and blue		4 Leads

Unipolar and Bipolar Half Coil, because we're using less turns, doesn't give us great low speed torque, but because of the low inductance, holds the torque out to high speeds.

Bipolar Series uses the full coil so it gives very good low speed torque. But because of the high inductance, the torque drops off rapidly.

Bipolar Parallel also uses the full coil so it gives good low speed performance. And its low inductance allows the torque to be held out to high speeds. But remember, we must increase current by 40% to get those advantages.

Unipolar/Bipolar Connections (2-Phase Motors)

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