JPS5510862A - Thyristor motor controller - Google Patents

Thyristor motor controller

Info

Publication number
JPS5510862A
JPS5510862A JP8310178A JP8310178A JPS5510862A JP S5510862 A JPS5510862 A JP S5510862A JP 8310178 A JP8310178 A JP 8310178A JP 8310178 A JP8310178 A JP 8310178A JP S5510862 A JPS5510862 A JP S5510862A
Authority
JP
Japan
Prior art keywords
circuit
value
altered
lead angle
control lead
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
Application number
JP8310178A
Other languages
Japanese (ja)
Inventor
Toshiaki Okuyama
Hiroshi Nagase
Yuzuru Kubota
Katsunori Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8310178A priority Critical patent/JPS5510862A/en
Publication of JPS5510862A publication Critical patent/JPS5510862A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE: To prevent the torque of a thyristor motor from varying by varying the current limiting value of a current limiting circuit when a control lead angle is altered.
CONSTITUTION: A synchronous motor 4 is operated via an AC power supply AC, a forward converter 1 and a reverse converter 2. When motor rotating speed is less than predetermined level, a speed judging circuit 15 produces a low level signal, and a phase shifter 13 produces an arc signal that the control lead angle is zero. In this case, the limiting value of the current limiting circuit 8 is set at low value. When the motor rotating speed is raised higher than predetermined value, the circuit 15 produces a high level signal. Thus, the control lead angle is so altered that the reverse converter 3 can naturally commutate, and the limiting value of the circuit 8 is altered to large value. Thus, the limiting value of the circuit 8 is altered to vary the current simultaneously upon variation of the control lead angle to thereby prevent the torque of the motor from varying.
COPYRIGHT: (C)1980,JPO&Japio
JP8310178A 1978-07-10 1978-07-10 Thyristor motor controller Pending JPS5510862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8310178A JPS5510862A (en) 1978-07-10 1978-07-10 Thyristor motor controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8310178A JPS5510862A (en) 1978-07-10 1978-07-10 Thyristor motor controller

Publications (1)

Publication Number Publication Date
JPS5510862A true JPS5510862A (en) 1980-01-25

Family

ID=13792792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8310178A Pending JPS5510862A (en) 1978-07-10 1978-07-10 Thyristor motor controller

Country Status (1)

Country Link
JP (1) JPS5510862A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104959683A (en) * 2015-07-06 2015-10-07 何锦尧 Forward and reverse rotating system for tapping machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104959683A (en) * 2015-07-06 2015-10-07 何锦尧 Forward and reverse rotating system for tapping machine

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