IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0104488
(1998-06-25)
|
발명자
/ 주소 |
- Bharadwaj, Aravind Sourirajan
- Deng, Fang
- Nehl, Thomas Wolfgang
- Naidu, Malakondaiah
|
출원인 / 주소 |
- Delphi Technologies, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
46 인용 특허 :
20 |
초록
▼
A three region control strategy for a permanent magnet motor is presented. In a first control region, the permanent magnet motor is operated at, a 120° conduction square wave mode at reduced phase current, and below a no-load speed. The motor phase current commutation causes eddy current losses in t
A three region control strategy for a permanent magnet motor is presented. In a first control region, the permanent magnet motor is operated at, a 120° conduction square wave mode at reduced phase current, and below a no-load speed. The motor phase current commutation causes eddy current losses in the rotor magnets and core which are insignificant due to the low phase currents and relatively low rotor speed. Meanwhile, the inverter switching losses are kept low as two switches are in use (on/off) for each current commutation during the 120° conduction mode. In a second control region, the permanent magnet motor is operated at a 180° conduction sinusoidal wave mode with high phase currents. The 180° conduction sinusoidal wave mode minimizes the commutation loss. In a third control region, the permanent magnet motor is operated above its no-load speed or in a field weakening mode. At these higher speeds the slot ripple and commutation losses on the rotor increase, and the demagnetizing component of the armature reaction increases due to field weakening. Commutation losses are minimized through sinusoidal current operation. In the field weakening mode, the phase current conduction angle is set to 180° and the phase currents become sinusoidal.
대표청구항
▼
A three region control strategy for a permanent magnet motor is presented. In a first control region, the permanent magnet motor is operated at, a 120° conduction square wave mode at reduced phase current, and below a no-load speed. The motor phase current commutation causes eddy current losses in t
A three region control strategy for a permanent magnet motor is presented. In a first control region, the permanent magnet motor is operated at, a 120° conduction square wave mode at reduced phase current, and below a no-load speed. The motor phase current commutation causes eddy current losses in the rotor magnets and core which are insignificant due to the low phase currents and relatively low rotor speed. Meanwhile, the inverter switching losses are kept low as two switches are in use (on/off) for each current commutation during the 120° conduction mode. In a second control region, the permanent magnet motor is operated at a 180° conduction sinusoidal wave mode with high phase currents. The 180° conduction sinusoidal wave mode minimizes the commutation loss. In a third control region, the permanent magnet motor is operated above its no-load speed or in a field weakening mode. At these higher speeds the slot ripple and commutation losses on the rotor increase, and the demagnetizing component of the armature reaction increases due to field weakening. Commutation losses are minimized through sinusoidal current operation. In the field weakening mode, the phase current conduction angle is set to 180° and the phase currents become sinusoidal. ic group; L represents a phenylene group or a naphthylene group; each of pairs R11and R12,R13and R14,R21and R22,and R23and R24may be combined with each other to form a ring; the compound contains at least one group represented by --SO3M, --CO2M or --OH in the molecule, wherein M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or pyridinium; with the proviso that the case where three or more of R11,R12,R13,R14,R21,R22,R23and R24are an aryl group is excluded; with the proviso that the case where at least one of R11,R12,R13and R14are combined with at least one of R21,R22,R23and R24to form a ring is excluded; and with the proviso that the compound does not contain a group represented by --N=N-- in the molecule. 2. The processing composition according to claim 1, wherein R11,R12,R13,R14,R21,R22,R23and R24each independently represents a hydrogen atom, an alkyl group or an aryl group. 3. The processing composition according to claim 1, wherein R11,R12,R13,R14,R21,R22,R23and R24each independently represents a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, a sulfomethyl group, a 2-hydroxyethyl group, a 3-hydroxypropyl group, a 2-hydroxypropyl group, a 2-sulfoethyl group, a 2-methoxyethyl group, 2-(2-hydroxyethoxy)ethyl group, a 2-[2-(2-hydroxyethoxy)ethoxy]ethyl group, a 2,3-dihydroxypropyl group, a 3,4-dihydroxybutyl group, a phenyl group, a 3-carboxyphenyl group, a 4-carboxyphenyl group, a 3,5-dicarboxyphenyl group, a 4-methoxyphenyl group, a 2-sulfophenyl group or a 4-sulfophenyl group. 4. The processing composition according to claim 1, wherein L is a substituted or unsubstituted phenylene or naphthylene group having 6 to 20 carbon atoms. 5. The processing composition according to claim 1, wherein L represents 1,4-phenylene, 1,3-phenylene, 1,2-phenylene, 1,5-naphthylene, 1,8-naphthylene, 4-carboxy-1,2-phenylene, 5-carboxy-1,3-phenylene, 3-sulfo-1,4-phenylene, 5-sulfo-1,3-phenylene, 2,5-dimethoxy-1,4-phenylene or 2,6-dichloro-1,4-phenylene. 6. The processing composition according to claim 1, wherein the ring formed by combining each of pairs R11and R12,R13and R14,R21and R22,and R23and R24is a 5- or 6-membered ring. 7. The processing composition according to claim 1, wherein the ring formed by each pair R11and R12,R13and R14,R21and R22,or R23and R24combined with each other is a pyrrolidine ring, a piperidine ring, a piperazine ring or a morpholine ring. 8. The processing composition according to claim 1, which further comprises a bis(triazinylamino)stilbene disulfonic acid compound. 9. The processing composition according to claim 1, wherein the concentration of the compound of formula (I) is from 0.05 to 20 mmol/L in a working solution. 10. The processing composition according to claim 1, which is a color developing composition, a bleaching composition, a bleach-fixing composition, a fixing composition, a water washing composition, a stabilizing composition, or an additive composition. 11. An image formation method comprising processing a silver halide photographic material with a processing composition for a silver halide photographic material according to claim 1. 12. The image formation method according to claim 10, wherein the silver halide photographic material is a color paper obtained by coating on a support a high silver chloride emulsion containin g at least 90 mol % or more of silver chloride. 13. The image formation method according to claim 10, wherein the silver halide photographic material is a color negative film or color reversal film obtained by coating on a support a high silver bromide emulsion containing at least 50 mol % or more of silver bromide.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.