GB1463770A - System for operating motors - Google Patents
System for operating motorsInfo
- Publication number
- GB1463770A GB1463770A GB1642974A GB1642974A GB1463770A GB 1463770 A GB1463770 A GB 1463770A GB 1642974 A GB1642974 A GB 1642974A GB 1642974 A GB1642974 A GB 1642974A GB 1463770 A GB1463770 A GB 1463770A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motors
- control
- source
- speed
- voltage
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/68—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more dc dynamo-electric motors
Abstract
1463770 Automatic speed control of a number of AC motors TOKYO SHIBAURA ELECTRIC CO Ltd 16 April 1974 [12 April 1973] 16429/74 Headings G3N and G3R [Also in Division H2] Groups 3, 4, 5 of motors, each comprising at least one motor connected to a load having a very small mechanical loss and a large inertia, are energized from a source 1 through switches SWA, SWB, SWC intermittently opened and closed in sequence by a control circuit 6. The closed periods of the switches may be successive, Fig. 2 (not shown) or overlapping, Fig. 7 (not shown) and the control may be applied to accelerate or decelerate the motors or operate them at a substantially constant speed. Whilst the control is of general application to motors, mention is made of controlling induction motors and the control is compared with a conventional one, in which the source 1 is permanently connected to the motors, for the parameters of normal speed and power loss, it being shown that the control of the invention enables the use of a source 1 for three motor groups of capacity only slightly greater than that necessary to operate a single motor group, due to the reduced power loss of the control caused by the use of induction motors operated at a high frequency and at a normal speed lower than that produced by the conventional control. The closed periods of the switches SWA, SWB, SWC may be the same or different according to the load demands on the respective groups. For varying loads the speeds of the motors may be sensed, each switch being closed when the speed falls below a minimum value and opened when it exceeds a maximum value. Such control, Figs. 8 and 9 (not shown) may be used to accelerate the motors which, if they are of induction type, may each have a capacitor connected thereacross to produce an induced voltage for speed sensing. For equal loads speed sensing may be replaced by closure of each switch for a predetermined time corresponding to the loads and the desired acceleration. Deceleration may involve regenerative braking and also variation of the voltage or frequency of the source 1, the latter controls also being applicable to acceleration. Fig. 10 shows a circuit employing voltage increase of the source 1 for acceleration, members 15-20 operating to open and close switches SWA, SWB, SWC until all the motors have reached a minimum speed set by member 17, whereupon the member 19 raises the setting of members 17, 20 by one step, member 20 causes increase of the voltage of source 1 by one step and further cycle of switching brings the motors up to the new minimum speed. Circuits for members 17, 16 and 18, 19 are described, Figs. 11, 12 and 13 (not shown). A reserve power source 14 may be used if desired during acceleration or deceleration (when Fig. 10 is used for this purpose). An openloop system may be used to accelerate the motors, Fig. 14 (not shown), the various load operating parameters such as friction torque and windage loss being computed and used to determine predetermined times during which the respective switches SWA, SWB, SWC are closed, followed by stepwise increase of the voltage of source 1 after each cycle of closure. The circuit of Fig. 1 may be triplicated with parallel connection of the sources 1 and the motor groups, Fig. 15 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP48041670A JPS49128215A (en) | 1973-04-12 | 1973-04-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1463770A true GB1463770A (en) | 1977-02-09 |
Family
ID=12614820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1642974A Expired GB1463770A (en) | 1973-04-12 | 1974-04-16 | System for operating motors |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS49128215A (en) |
DE (1) | DE2417982C3 (en) |
GB (1) | GB1463770A (en) |
NL (1) | NL159922C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102611286A (en) * | 2011-12-21 | 2012-07-25 | 广东美的电器股份有限公司 | High-integrated intelligent power module |
CN111149288A (en) * | 2017-10-03 | 2020-05-12 | 三菱电机株式会社 | Motor control device |
US11264924B2 (en) | 2018-03-30 | 2022-03-01 | Mitsubishi Electric Corporation | Motor driving apparatus and refrigeration cycle equipment |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4100466A (en) * | 1976-12-10 | 1978-07-11 | The Singer Company | Cold start system for motors |
JPS57166618A (en) * | 1981-04-03 | 1982-10-14 | Matsushita Electric Ind Co Ltd | Time division constant current outputting circuit |
JPS57183295A (en) * | 1981-05-06 | 1982-11-11 | Hitachi Ltd | Speed controller |
JPS5989592A (en) * | 1982-11-13 | 1984-05-23 | Fanuc Ltd | Switching control system for plural motors |
JPS59198895A (en) * | 1983-04-22 | 1984-11-10 | Aida Eng Ltd | Time division control circuit of motor |
JPS6087688A (en) * | 1983-10-19 | 1985-05-17 | Hitachi Ltd | Rotating speed controller of motor |
JPS6087687A (en) * | 1983-10-19 | 1985-05-17 | Hitachi Ltd | Controlling method of plural dc motors |
AT401981B (en) * | 1992-11-16 | 1997-01-27 | Vaillant Gmbh | METHOD FOR OPERATING A POWER SUPPLY |
DE19518306B4 (en) * | 1994-05-27 | 2007-04-19 | Volkswagen Ag | Device for controlling a number of mutually communicating actuators of a system |
JP4869828B2 (en) * | 2006-03-03 | 2012-02-08 | 本田技研工業株式会社 | Inverter device and motor control device |
JPWO2022185831A1 (en) * | 2021-03-03 | 2022-09-09 | ||
WO2022185830A1 (en) * | 2021-03-03 | 2022-09-09 | 村田機械株式会社 | Motor system |
-
1973
- 1973-04-12 JP JP48041670A patent/JPS49128215A/ja active Pending
-
1974
- 1974-04-11 DE DE19742417982 patent/DE2417982C3/en not_active Expired
- 1974-04-11 NL NL7404935A patent/NL159922C/en not_active IP Right Cessation
- 1974-04-16 GB GB1642974A patent/GB1463770A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102611286A (en) * | 2011-12-21 | 2012-07-25 | 广东美的电器股份有限公司 | High-integrated intelligent power module |
CN111149288A (en) * | 2017-10-03 | 2020-05-12 | 三菱电机株式会社 | Motor control device |
EP3694101A4 (en) * | 2017-10-03 | 2020-08-19 | Mitsubishi Electric Corporation | Motor control device |
CN111149288B (en) * | 2017-10-03 | 2023-08-08 | 三菱电机株式会社 | Motor control device |
US11264924B2 (en) | 2018-03-30 | 2022-03-01 | Mitsubishi Electric Corporation | Motor driving apparatus and refrigeration cycle equipment |
Also Published As
Publication number | Publication date |
---|---|
DE2417982C3 (en) | 1978-10-05 |
DE2417982B2 (en) | 1978-02-09 |
NL159922C (en) | 1979-09-17 |
NL7404935A (en) | 1974-10-15 |
JPS49128215A (en) | 1974-12-09 |
NL159922B (en) | 1979-04-17 |
DE2417982A1 (en) | 1974-10-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |