General-purpose induction motor adaptable for a plurality of types of AC power supply
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02H-007/06
H02P-011/00
H02P-009/00
출원번호
US-0098162
(2002-03-15)
우선권정보
JP-0074001 (2001-03-15)
발명자
/ 주소
Hayashi, Hidetoshi
Nagayasu, Takuya
출원인 / 주소
Sumitomo Heavy Industries, Ltd.
대리인 / 주소
Squire, Sanders & Dempsey L.L.P.
인용정보
피인용 횟수 :
2인용 특허 :
14
초록▼
In a general-purpose induction motor, a three-phase induction motor 10 is provided with a terminal box containing terminals for electrical connection and a conversion module 30 contained in the terminal box and coupled to the three-phase induction motor. The conversion module has a function of conve
In a general-purpose induction motor, a three-phase induction motor 10 is provided with a terminal box containing terminals for electrical connection and a conversion module 30 contained in the terminal box and coupled to the three-phase induction motor. The conversion module has a function of converting a plurality of types of single-phase AC into a single type of three-phase AC. With this structure, the general-purpose induction motor can be used with the single-phase AC.
대표청구항▼
1. A general-purpose induction motor comprising a three-phase induction motor provided with a terminal box containing terminals for electrical connection and a conversion module contained in said terminal box and coupled to said three-phase induction motor, said conversion module having a function o
1. A general-purpose induction motor comprising a three-phase induction motor provided with a terminal box containing terminals for electrical connection and a conversion module contained in said terminal box and coupled to said three-phase induction motor, said conversion module having a function of converting a plurality of types of single-phase AC into a single type of three-phase AC so that said general-purpose induction motor can be used with the single-phase AC, said conversion module comprising a converter for converting the single-phase AC into DC, a capacitor for smoothing the DC as an output of said converter into smoothed DC, an inverter for converting the smoothed DC into the three-phase AC, a current/voltage detecting circuit for detecting a DC current/voltage to produce a current/voltage detection signal, a drive circuit for driving said inverter, and a first microcomputer for controlling said drive circuit in response to said current/voltage detection signal from said current/voltage detecting circuit. 2. A general-purpose induction motor as claimed in claim 1, wherein said conversion module is adaptable for an input of single-phase 100V or 200V and a frequency of 50 Hz or 60 Hz, said three-phase induction motor being a 200V class induction motor. 3. A general-purpose induction motor as claimed in claim 1, wherein said conversion module is coupled to a circuit board including a second microcomputer and having at least one of a frequency setting function, an acceleration time/deceleration time setting function for soft start/stop, and an electronic thermal relay function. 4. A general-purpose induction motor as claimed in claim 1, further comprising a cooling fan, said terminal box being mounted on an outer casing of said three-phase induction motor, said conversion module having a heat generating portion and placed in said terminal box, said conversion module in said terminal box being cooled by a part of a cool wind flowing from said cooling fan through a space between said terminal box and said outer casing. 5. A general-purpose induction motor as claimed in claim 4, wherein said outer casing is provided with a plurality of first cooling fins, said terminal box being provided with a plurality of second cooling fins formed on an external bottom surface thereof, the above-mentioned part of the cooling wind from said cooling fan passing through an air duct defined between said first and said second cooling fins. 6. A general-purpose induction motor as claimed in claim 1, wherein said general-purpose induction motor is provided with a deceleration mechanism coupled to an output shaft thereof and serves as a gear. 7. A general-purpose induction motor comprising a three-phase induction motor and a conversion module coupled to said three-phase induction motor, said conversion module having a function of converting a plurality of types of single-phase AC into a single type of three-phase AC so that said general-purpose induction motor can be used with the single-phase AC, said conversion module comprising a converter for converting the single-phase AC into DC, a capacitor for smoothing the DC as an output of said converter into smoothed DC, an inverter for converting the smoothed DC into the three-phase AC, a current/voltage detecting circuit for detecting a DC current/voltage to produce a current/voltage detection signal, a drive circuit for driving said inverter, and a first microcomputer for controlling said drive circuit in response to said current/voltage detection signal from said current/voltage detecting circuit. 8. A general-purpose induction motor as claimed in claim 7, wherein said conversion module is adaptable for an input of single-phase 100V or 200V and a frequency of 50 Hz or 60 Hz, said three-phase induction motor being a 200V class induction motor. 9. A general-purpose induction motor as claimed in claim 7, wherein said conversion module is coupled to a circuit board including a second microcomputer and having at least one of a frequency setting function, an acceleration time/deceleration time setting function for soft start/stop, and an electronic thermal relay function. 10. A general-purpose induction motor as claimed in claim 7, wherein said general-purpose induction motor is provided with a deceleration mechanism coupled to an output shaft thereof and serves as a gear.
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