Two-phase hybrid step motor driven by three-phase driver

Details Two-phase hybrid step motor driven by three-phase driver Two-phase hybrid step motor driven by three-phase driver

1999-09-30

2000-09-05

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310179, 310180, 310184, 310189, 310200, 318696, H02K 3700, H02K 100, H02K 300, H02K 1926, H02K 1700

Patent

active

061147826

ABSTRACT:
Disclosed is a stator of 2-phase step motor that has 4 stator coils, two in each phase. The coils are wound around 8 stator poles in a standard bifilar winding pattern. The first center-tap of the first phase and the second center tap of the second phase are connected. One end of the first phase makes a first terminal. One end of the second phase makes a second terminal. The other end of the first phase and the other end of the second phase are connected to make a third terminal. A three-phase driver can drive the step motor via these three terminals. Performance of the stator of the step motor can be improved by increasing the number of turns of the two coils whose ends make the first and second terminals. Then the three phase resistances of the stator can be adjusted to have similar resistances by reducing the wire gauge of the other two coils. This reduction of the wire size compensates for the space needed for the increase in the numbers of coil turns mentioned above. This connection scheme applies in general to a 4N-pole stator of a 2-phase step motor.

REFERENCES:
patent: 3466518 (1969-09-01), Aylikci et al.
patent: 3629636 (1971-12-01), Hill
patent: 4638195 (1987-01-01), Lin
patent: 4733113 (1988-03-01), Smith
patent: 4792709 (1988-12-01), Smith et al.
patent: 5406185 (1995-04-01), Strunk
patent: 5444316 (1995-08-01), Ohya et al.
patent: 5689167 (1997-11-01), Vitunic

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