JPH0226340U - - Google Patents

Info

Publication number
JPH0226340U
JPH0226340U JP10341288U JP10341288U JPH0226340U JP H0226340 U JPH0226340 U JP H0226340U JP 10341288 U JP10341288 U JP 10341288U JP 10341288 U JP10341288 U JP 10341288U JP H0226340 U JPH0226340 U JP H0226340U
Authority
JP
Japan
Prior art keywords
discharge resistor
integration
integrator
time
command
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
JP10341288U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP10341288U priority Critical patent/JPH0226340U/ja
Publication of JPH0226340U publication Critical patent/JPH0226340U/ja
Pending legal-status Critical Current

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  • Stopping Of Electric Motors (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の実施例を示す回路図である
。 １……交流電源、２……整流器、３……インバ
ータ、４……電動機、５……ベース駆動回路、６
……抵抗保護回路、Ｃｄ……平滑用コンデンサ、
Ｃｉ……積分コンデンサ、ＣＰ……電圧比較器、
ＯＡ……演算増巾器、Ｒｄ……回生電力放電抵抗
、Ｒ１，Ｒ２……入力抵抗。 FIG. 1 is a circuit diagram showing an embodiment of this invention. 1... AC power supply, 2... Rectifier, 3... Inverter, 4... Electric motor, 5... Base drive circuit, 6
...Resistance protection circuit, Cd...Smoothing capacitor,
Ci... Integrating capacitor, CP... Voltage comparator,
OA...Arithmetic amplifier, Rd...Regenerative power discharge resistance, R1 , R2 ...Input resistance.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 直列に接続されたスイツチング素子のＯＮ・Ｏ
ＦＦ制御によりその通電時間を調整し逆変換回路
からの回生電力を吸収する放電抵抗の過熱保護回
路であつて、適当な積分時間を有する積分器と、
該積分器の出力値が所定の値以上になつたことを
検出する比較器とを備えて成り、前記積分器に対
し、前記スイツチング素子に対するＯＮ指令によ
り前記放電抵抗の温度上昇時定数に対応する時間
勾配にて積分動作させ、次に該積分内容を前記ス
イツチング素子に対するＯＦＦ指令により前記放
電抵抗の温度下降時定数に対応する時間勾配にて
減算する逆方向の積分を行なはせ、該両積分動作
結果に対する前記比較器の出力信号を以つて前記
放電抵抗の過熱状態信号となすことを特徴とする
回生電力放電抵抗の過熱保護回路。 ON/O of switching elements connected in series
An overheat protection circuit for a discharge resistor that absorbs regenerated power from an inverse conversion circuit by adjusting its energization time by FF control, and an integrator having an appropriate integration time;
and a comparator for detecting that the output value of the integrator has exceeded a predetermined value, and the integrator is configured to respond to the temperature rise time constant of the discharge resistor by an ON command to the switching element. Integration is performed at a time gradient, and then integration is performed in the opposite direction by subtracting the integration content at a time gradient corresponding to the temperature drop time constant of the discharge resistor by an OFF command to the switching element. An overheat protection circuit for a regenerative power discharge resistor, characterized in that an output signal from the comparator corresponding to an integral operation result is used as an overheat state signal for the discharge resistor.
JP10341288U 1988-08-04 1988-08-04 Pending JPH0226340U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10341288U JPH0226340U (en) 1988-08-04 1988-08-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10341288U JPH0226340U (en) 1988-08-04 1988-08-04

Publications (1)

Publication Number Publication Date
JPH0226340U true JPH0226340U (en) 1990-02-21

Family

ID=31334221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10341288U Pending JPH0226340U (en) 1988-08-04 1988-08-04

Country Status (1)

Country Link
JP (1) JPH0226340U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996034450A1 (en) * 1995-04-28 1996-10-31 Fanuc Ltd Method and device for protecting regenerating resistor of servo motor for driving inverter
JP2010200416A (en) * 2009-02-23 2010-09-09 Toyota Motor Corp Device for prevention and control of motor heat generation
WO2020044454A1 (en) * 2018-08-29 2020-03-05 東芝三菱電機産業システム株式会社 Electric power converter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996034450A1 (en) * 1995-04-28 1996-10-31 Fanuc Ltd Method and device for protecting regenerating resistor of servo motor for driving inverter
JP2010200416A (en) * 2009-02-23 2010-09-09 Toyota Motor Corp Device for prevention and control of motor heat generation
WO2020044454A1 (en) * 2018-08-29 2020-03-05 東芝三菱電機産業システム株式会社 Electric power converter
JPWO2020044454A1 (en) * 2018-08-29 2020-09-03 東芝三菱電機産業システム株式会社 Power converter
US11362578B2 (en) 2018-08-29 2022-06-14 Toshiba Mitsubishi-Electric Industrial Systems Corporation Power conversion apparatus

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