JPS54109125A - Chopper control device - Google Patents
Chopper control deviceInfo
- Publication number
- JPS54109125A JPS54109125A JP1631078A JP1631078A JPS54109125A JP S54109125 A JPS54109125 A JP S54109125A JP 1631078 A JP1631078 A JP 1631078A JP 1631078 A JP1631078 A JP 1631078A JP S54109125 A JPS54109125 A JP S54109125A
- Authority
- JP
- Japan
- Prior art keywords
- chopper
- set value
- decreasing
- conductivity
- control device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To provide a chopper control device wherein when heat generated from a chopper has reached a set value, the period of interrupting the chopper is prevented from decreasing to a value less than the set value.
CONSTITUTION: When the conductivity of a chopper 6 is controlled by a hybrid control system by operating alternately an on-pulse oscillating circuit 2 and an on- pulse oscillating circuit 3 by the output of an accelerator circuit 1 of an electric motor car or the like, the detection of overheat of the chopper 6 is carried out by a thermostat 4b, and the base current of a transistor 2a of the on-pulse oscillator 2 is determined through a diode 1j by a potential operating at a point d of the accelerator circuit 1, thereby preventing the oscillation period from decreasing to a value less than the set value. For this reason, since the conductivity of the chopper is suppressed, and, at the same time, the maximum chopping frequency is lowered, it is possible to suppress loss at the time of commutation and to prevent overheating of the chopper.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1631078A JPS54109125A (en) | 1978-02-15 | 1978-02-15 | Chopper control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1631078A JPS54109125A (en) | 1978-02-15 | 1978-02-15 | Chopper control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54109125A true JPS54109125A (en) | 1979-08-27 |
Family
ID=11912945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1631078A Pending JPS54109125A (en) | 1978-02-15 | 1978-02-15 | Chopper control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54109125A (en) |
-
1978
- 1978-02-15 JP JP1631078A patent/JPS54109125A/en active Pending
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