Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Patent
1997-07-16
1999-07-27
Ip, Paul
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
318798, 318808, 318254, 62 89, 62209, H02P 540
Patent
active
059295910
ABSTRACT:
For achieving an air conditioner being applicable to various a-c source voltages in common and operative with high power factor by suppressing generation of high harmonics, an a-c source voltage from an a-c electric power source 1 is rectified in full-wave by a rectifier 2, and a d-c source voltage Ed of an inverter 13 is obtained by being charged in a condenser 5. Here, there are a-c source voltages of 100 V and 200 V, and a divided voltage Ed1 of the d-c voltage of the condenser 5 is selected when the a-c source voltage is 100 V, a divided voltage Ed2 (here, Ed1>Ed1) of the d-c voltage of the condenser 5 is selected when the a-c source voltage is 200 V, respectively by an exchange switch 18, and is used as a d-c voltage Ed' for controlling on and off of a switch element 6. Though the d-c source voltage Ed differs depending on the a-c source voltage of 100 V or 200 V, it is possible to set the d-c source voltage Ed at a voltage value for operating the inverter 13 with low loss and high efficiency, for each one of the a-c source voltages, by setting a ratio of the voltage division appropriately.
REFERENCES:
patent: 4686834 (1987-08-01), Haley et al.
patent: 4726738 (1988-02-01), Nakamura et al.
patent: 4736143 (1988-04-01), Nakamura et al.
patent: 4856286 (1989-08-01), Sulfstedo et al.
patent: 4879502 (1989-11-01), Endo et al.
patent: 5519301 (1996-05-01), Yoshida et al.
Inoue Toru
Ishii Makoto
Katou Kouji
Kawabata Yukio
Morimoto Motoo
Hitachi , Ltd.
Ip Paul
LandOfFree
Air conditioner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Air conditioner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air conditioner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-882611