EP0585551A2 - Dispositif de commande de la vitesse des moteurs à courant alternatif ou triphasés - Google Patents

Dispositif de commande de la vitesse des moteurs à courant alternatif ou triphasés Download PDF

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Publication number
EP0585551A2
EP0585551A2 EP93109672A EP93109672A EP0585551A2 EP 0585551 A2 EP0585551 A2 EP 0585551A2 EP 93109672 A EP93109672 A EP 93109672A EP 93109672 A EP93109672 A EP 93109672A EP 0585551 A2 EP0585551 A2 EP 0585551A2
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EP
European Patent Office
Prior art keywords
switch
switching
semiconductor switch
contact
relay
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.)
Withdrawn
Application number
EP93109672A
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German (de)
English (en)
Other versions
EP0585551A3 (fr
Inventor
Emmerich Röhrnbacher
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0585551A2 publication Critical patent/EP0585551A2/fr
Publication of EP0585551A3 publication Critical patent/EP0585551A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids

Definitions

  • the invention relates to a device for speed control of AC or three-phase motors, in particular motors for driving fans, which is provided with means for gradually changing the voltage applied to the motor and with a switch for setting the desired speed level.
  • Transformers with secondary taps are used as a means of changing the voltage applied to the motor.
  • five speed levels can generally be set and, for example, with an input voltage of 220/240 volts on the transformer, output voltages of 60, 105, 130, 160 and 220 volts can be tapped from its transformer taps.
  • Controls of this type have proven themselves, but they are expensive to set up and, moreover, have poor efficiencies. At most, transformers achieve an efficiency of 80 percent. Also, at least for larger outputs, the transformers must be provided with ribs for heat dissipation or even be equipped with special cooling systems.
  • the object of the present invention is therefore to provide a control of the type and intended use which is simpler and less expensive to manufacture, and which is also to be characterized by better efficiencies than the controls according to the prior art.
  • control device in the control device according to the preamble of claim 1, the control takes place via one capacitor at each speed level, which can be switched on in parallel in the supply line of the motor, and in that each capacitor is initially connected via a contactless semiconductor switch and directly can then be applied to the supply voltage via a relay with a switching contact arranged in parallel with the respective semiconductor switch.
  • the invention is therefore that capacitors have taken the place of a transformer with a number of secondary taps corresponding to the desired number of switching stages. Depending on the desired switching level, these capacitors can gradually be switched in parallel to one another. A practically loss-free speed control is thereby realized.
  • each capacitor in parallel to each other is assigned a contactless semiconductor switch and the switching contact of a switching relay and that first the contactless semiconductor switch is switched on by applying a control voltage and then immediately afterwards by triggering the relay the relay contact of this switching stage in Closing position is brought.
  • a speed control has thus been created which can be designed for any number of switching stages, each switching stage being assigned a capacitor and the latter being able to be applied to the supply voltage in succession via a contactless semiconductor switch and then via the switching contact of a relay.
  • the capacitors of the individual switching stages can be connected in parallel with one another with the result that when the second and each subsequent speed stage are switched on, the capacitances of the capacitors assigned to these stages add up to one another.
  • An expedient development of the invention provides that the contactless semiconductor switch and the relay with the switch contact parallel to the semiconductor switch can be controlled in each speed stage via their in turn arranged switching contacts and that the switching contact serving to control the relay of each speed level immediately after actuating the Switch contact is actuated to control the associated semiconductor switch in its closed position.
  • the switch for setting the desired speed level is designed as a sequential switch with inevitable actuation of the contacts serving to actuate the relays in the individual switching stages after prior actuation of the contacts for actuating the respective semiconductor switch in their closed positions.
  • This switch can be a rotary or slide switch.
  • Another advantageous further development of the invention provides that the switching functions of the switch for setting the desired speed level depending on environmental conditions are triggered by means of a sensor system.
  • Each of the switching stages of the device for speed control is equipped with a capacitor C1, C2 ... which can be switched into the supply line of the motor M and also has a contactless semiconductor switch T1, T2 ... (in a special arrangement with passive components) and a relay R1, R2 ... with a switching contact K1, K2 ... arranged in parallel to the semiconductor switch of the relevant switching stage.
  • the contact S1.1 When the first switching stage is switched on, the contact S1.1 is brought into the closed position by means of the sequential switch and thereby the contactless semiconductor switch T1 is switched to continuity, with the result that a circuit from L to the contactless semiconductor switch T1, the capacitor C1 and the motor M. N closes.
  • the switch contact S1.2 of the first stage Immediately after the contactless semiconductor switch T1 has switched, as shown in the diagram in FIG. 2, the switch contact S1.2 of the first stage is in the closed position, as a result of which the relay R1 is actuated and its switch contact K1 arranged in parallel with the semiconductor switch T1 Closed position actuated, which then forms a current path parallel to the semiconductor switch T1.
  • the structure of the second switching stage, and any other switching stages that may be present, is the same as switching stage 1. If the second switching stage is to be switched on, the contactless semiconductor switch T2 is first activated and closed for continuity by closing the switch contact S2.1, whereupon the relay R2 is actuated by immediately following actuation of the switch contact S2.2 and the switch contact K2 is thereby closed. The capacitor C2 of the switching stage 2 is then connected in parallel to the capacitor C1 of the switching stage 1 and the total capacitance switched into the supply line of the motor M is equal to the sum of the capacitances of the capacitors C1 and C2.
  • the diagram according to FIG. 2 illustrates analogously to switching stage 1 for switching stage 2 and a third switching stage indicated in this diagram the closing of the switching contact S2.2 applying the relay R2 to the supply voltage immediately after the closing of the switching contact S2.1 to apply the contactless semiconductor switch T2 to the supply voltage.
  • the contactless semiconductor switches T1, T2 are illustrated in the same way as the switch contacts K1, K2 of the relays R1, R2 as switch contacts which can be actuated between a closed and an open position, merely for the sake of clarity.
  • the semiconductor switches are contactless switching elements in connection with passive components which are switched to continuity by application to a special supply voltage as a result of actuation of the assigned switching contacts S1.1, S2.1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Ac Motors In General (AREA)
EP9393109672A 1992-08-29 1993-06-17 Dispositif de commande de la vitesse des moteurs à courant alternatif ou triphasés. Withdrawn EP0585551A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4228858A DE4228858A1 (de) 1992-08-29 1992-08-29 Einrichtung zur Drehzahlsteuerung von Wechsel- oder Drehstrommotoren
DE4228858 1992-08-29

Publications (2)

Publication Number Publication Date
EP0585551A2 true EP0585551A2 (fr) 1994-03-09
EP0585551A3 EP0585551A3 (fr) 1994-11-02

Family

ID=6466773

Family Applications (1)

Application Number Title Priority Date Filing Date
EP9393109672A Withdrawn EP0585551A3 (fr) 1992-08-29 1993-06-17 Dispositif de commande de la vitesse des moteurs à courant alternatif ou triphasés.

Country Status (2)

Country Link
EP (1) EP0585551A3 (fr)
DE (1) DE4228858A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100428624C (zh) * 2006-10-08 2008-10-22 鹤山市多普乐高新节电技术有限公司 全自动三相电机节电器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950001580U (ko) * 1993-06-26 1995-01-04 안병진 선풍기의 ac모우터 속도제어장치
DE102008045651A1 (de) * 2008-09-03 2010-03-04 Wilo Se Kreiselmotorpumpe mit Drehzahleinstellung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408150A (en) * 1980-05-20 1983-10-04 Emerson Electric Co. Speed control system and method for electric motor
EP0332855A2 (fr) * 1988-03-16 1989-09-20 OMRON Corporation Relais hybride

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829393A (ja) * 1981-08-12 1983-02-21 Hitachi Ltd コンデンサモ−タ
JPS6042538A (ja) * 1983-08-18 1985-03-06 Daikin Ind Ltd ヒ−トポンプ式空気調和装置の室外機におけるファン制御装置
JPH07108114B2 (ja) * 1986-10-24 1995-11-15 株式会社日立製作所 フアンモ−タの制御回路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408150A (en) * 1980-05-20 1983-10-04 Emerson Electric Co. Speed control system and method for electric motor
US4408150B1 (en) * 1980-05-20 1993-12-28 Emerson Electric Co. Speed control system and method for electric motor
US4408150B2 (en) * 1980-05-20 1996-12-17 Emerson Electric Co Speed control system and method for electric motor
EP0332855A2 (fr) * 1988-03-16 1989-09-20 OMRON Corporation Relais hybride

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 351 (E-660) 20. September 1988 & JP-A-63 107 489 (HITACHI LTD) 12. Mai 1988 *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 107 (E-174) (1252) 11. Mai 1983 & JP-A-58 029 393 (HITACHI SEISAKUSHO KK) 21. Februar 1983 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 168 (M-396) 13. Juli 1985 & JP-A-60 042 538 (DAIKIN KOGYO KK) 6. März 1985 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100428624C (zh) * 2006-10-08 2008-10-22 鹤山市多普乐高新节电技术有限公司 全自动三相电机节电器

Also Published As

Publication number Publication date
DE4228858A1 (de) 1994-03-03
EP0585551A3 (fr) 1994-11-02

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