Resolver Feedback

General

Two fixed stator windings are arranged shifted by 90°, surrounding the rotor (rotor winding). The rotor winding is supplied with a sinusoidal AC voltage.

The tensions induced in S1 and S2 (amplitudes) depend on the rotor angle and correspond to the sine and cosine of the rotor angle.

The rotor angle alpha is calculated by the amplitudes a₁ and a₂ with α=arctan (a₁/a₂)

Designs

Beside the described 2-poles Resolver there are multipole designs. A 4-poles Resolver supplies a phase shift of 2·360° during one rotor revolution.

Application

Resolvers are used in many applications such as textile machines, mining industry machines and servo motors due to their robust and economical design. Resolvers work nearly wear-free.

Resolver Specification for AKD

in process

Resolver Specification for S300/S700

in process

Resolver Specification for S400/S600

• Excitation voltage is 4,9 Vrms (û = 7V)
• Frequency is 8 KHz
• Max. excitation current is 35 mA
• Max. phase shift is +/- 10° at 8KHz
• Transformation ratio is 0.5

Transformation ratio is 0.5   Enclosed are data of 3 different resolver types that fit the requirements.

	V23401-H1005-B101	JSSBH-15	JSSBH-21
Manufacturer	Siemens	Litton	Litton
Status	High Impedant	Optimum	Low Impedant
Input Voltage	4Vrms, 5Khz	7Vrms, 5Khz	7Vrms, 5Khz
Phase Shift	16° +/-4°	17° +/-3°	16° +/-4°
Impedance Zro (Ohm)	169 + J311	73 + J93	73 + J65
Impedance Zso (Ohm)	119 + J164	135 + J170	110 + J210
Impedance Zss (Ohm)	134 + J228	115 + J150	105 + J185
DC Res. Stator (Ohm)	55	77	55
DC Res. Rotor (Ohm)	24	40	23
Electrical Error	+/- 10 min	+/- 10 min	+/- 10 min

Further Information

• FPGA based Resolver Conversion with Delta Sigma Technology
• Resolver Setup

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