EP0364976A1 - Durch eine Uhr gesteuerter elektronischer Schalter zur Steuerung eines Motors - Google Patents

Durch eine Uhr gesteuerter elektronischer Schalter zur Steuerung eines Motors Download PDF

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Publication number
EP0364976A1
EP0364976A1 EP89119303A EP89119303A EP0364976A1 EP 0364976 A1 EP0364976 A1 EP 0364976A1 EP 89119303 A EP89119303 A EP 89119303A EP 89119303 A EP89119303 A EP 89119303A EP 0364976 A1 EP0364976 A1 EP 0364976A1
Authority
EP
European Patent Office
Prior art keywords
motor
electronic switch
electronic
inverter
clock
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Withdrawn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
EP89119303A
Other languages
English (en)
French (fr)
Inventor
Alessandro Michieletto
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.)
ARTURO JUNGHANS SpA
Original Assignee
ARTURO JUNGHANS SpA
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 ARTURO JUNGHANS SpA filed Critical ARTURO JUNGHANS SpA
Publication of EP0364976A1 publication Critical patent/EP0364976A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D06F37/306—
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/10—Power supply arrangements, e.g. stand-by circuits

Definitions

  • the present invention relates to a clock-controlled electronic switch for piloting motors.
  • the present invention relates to an electronic switch suitable for programming the operating time of apparatuses which, during their use, require frequent reversals of the revolution direction of a motor.
  • the clock-controlled electronic switch makes it possible a sequence of states of commutation of a set of contacts capable of accomplishing reversals in the direction of revolution of motors, such as, e.g., the motors of household electrical apparatuses and appliances, or of other devices, to be programmed for a variable time, comprised within the range of from a few minutes up to some hours.
  • motors such as, e.g., the motors of household electrical apparatuses and appliances, or of other devices
  • a preferred application of the clock-controlled electronic switch according to the present invention is in laundry dryers in which, as known, a continuous reversal of the direction of revolution of the dryer basket is required during the drying process.
  • the purpose of the present invention is of providing a clock-controlled electronic switch which does not show the above reminded drawbacks.
  • the purpose of the present invention is of providing a clock-controlled electronic switch for motor piloting which is reliable, simple to be manufactured, which has small overall dimensions, and which makes it possible the time of switching of the electrical contacts to be varied as desired, and the wear of said electrical contacts to be reduced.
  • the mechanical or electromechanical timer makes it possible the total time to be programmed, and the electronic inverter makes it possible the sequence of motor operating steps to be programmed.
  • the main timer of mechanical or electromechanical type renders the electronic switch according to the present invention particularly reliable, so that said electronic switch can be given a rating which assigns it to the highest reliability classes; and the presence of an electronic inverter makes it possible both fast and reliable switchings to be carried out, and the contacts of possibly present relays to be actuated in the absence of electrical current, so as to secure a very reduced wear of such contacts.
  • the clock-controlled electronic timer comprises a main mechanical switchgear (2) installed between the electrical power input (1) and a mechanical timer (3).
  • a set of primary contacts (A1, A2, A n ) can be inserted between the main switchgear (1) and the timer (3), through intermediate switches (4′, 4 ⁇ , and so forth).
  • the output from the timer (3) is connected with the primary contacts (A1, A2, A n ) and with an electronic inverter (5) equipped with solid-state switches (61, 62, 6 n ) in their turn connected with secondary contacts (B1, B2, B n ).
  • FIG 2 shows a schematic view of the electromechanical timer (3) of Figure 1.
  • Said timer comprises a gear reduction unit (7) actuated by a synchronous motor (8).
  • the reducer (7) actuates a cam (9). The necessary time for the cam to make a complete revolution depends on the revolution speed (rpm) of the motor (8) and on the transmission ratio of the gear reduction unit (7).
  • the cam (9) directly actuates the electrical contacts (10) constituted by elastic metal blades accurately following the contour of the cam (9).
  • the electrical contacts (10) transmit the electrical power from the inlet (1 ) to the primary contacts (A1, A2, A n , and so forth), to the electronic inverter (5) and to the motor (8).
  • the electronic timer operates as follows.
  • the control knob (11) is rotated up to the desire delay time. By means of its own shaft, said control knob causes the cam (9), which closes the contacts (10), to rotate.
  • the electrical power incoming from the input (1) is thus fed to the motor (8), to the electronic inverter (5) and to the various primary contacts (A1, A2, A n ), used in order to feed auxiliary electrical elements, such as electrical heating resistors, pilot lamps, and so forth.
  • the motor (8) actuates the gear reduction unit (7) and consequently the cam (9), in the direction opposite to the revolution direction supplied by the control knob (11).
  • the cam (9) opens the contacts (10) and the various outputs are isolated from the input (1).
  • Figure 3 shows a schematic view of the electronic inverted (5) connected with the electromechanical timer (3) of Figure 2.
  • the electrical power coming from the contacts (10) of the electromechanical timer (3) is reduced in voltage, is rectified, and is stabilized by the circuits (12) and (13) of type known from the prior art.
  • the output of the circuit (13) is connected with the electronic circuits (14) and (15), one of which (14) generates a frequency which acts as the time reference basis, and the other one (15) is formed by a plurality of dividers and of logic circuits for generating the required time sequence.
  • Such electronic circuits (14) and (15) are of a type known from the prior art, and therefore they need not to be disclosed in detail.
  • the electronic circuit (15) is connected with an inverter (16) through a logic level of the time sequence. Said inverter (16), piloted by the sequence of commands at the logic level, transmits to the outputs (17, 18) the electrical power present at its input (19).
  • the outputs are connected with the electrical motor (20) of a laundry dryer or of another household appliance, or of other apparatuses.
  • FIG. 4 A diagram of application of the clock-controlled electronic switch according to the present invention to a laundry dryer is shown in Figure 4, in which the primary contact A2 is connected with the heating resistor R and both outputs (17) and (18) of the electronic inverter (5) are connected with the dryer basket motor (20) through triacs (21) and (22).
  • the timer of electromechanical type can be a synchrotimer JV100 of the type with two open contacts.
  • each cycle is of 300 seconds.
  • the time schedule of each cycle is: - 150 seconds or basket revolution in clockwise direction; - 2,5 seconds of pause; - 150 seconds or basket revolution in counterclockwise direction; - 2,5 seconds of pause

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Motor And Converter Starters (AREA)
EP89119303A 1988-10-20 1989-10-18 Durch eine Uhr gesteuerter elektronischer Schalter zur Steuerung eines Motors Withdrawn EP0364976A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8822362A IT1229944B (it) 1988-10-20 1988-10-20 Interruttore elettronico a tempo per pilotaggio di motori.
IT2236288 1988-10-20

Publications (1)

Publication Number Publication Date
EP0364976A1 true EP0364976A1 (de) 1990-04-25

Family

ID=11195227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119303A Withdrawn EP0364976A1 (de) 1988-10-20 1989-10-18 Durch eine Uhr gesteuerter elektronischer Schalter zur Steuerung eines Motors

Country Status (2)

Country Link
EP (1) EP0364976A1 (de)
IT (1) IT1229944B (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1485955A (fr) * 1966-07-01 1967-06-23 Siemens Elektrogeraete Gmbh Circuit de renversement de marche, notamment pour machines à laver
FR2297274A1 (fr) * 1975-01-11 1976-08-06 Doublefell Ltd Machine a laver
EP0038671A2 (de) * 1980-04-16 1981-10-28 Servis Domestic Appliances Limited Verfahren und Maschinen zum Waschen textiler Artikel
FR2588581A1 (fr) * 1985-10-11 1987-04-17 Ciapem Lave-linge ou seche-linge a tambour tournant dans les deux sens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1485955A (fr) * 1966-07-01 1967-06-23 Siemens Elektrogeraete Gmbh Circuit de renversement de marche, notamment pour machines à laver
FR2297274A1 (fr) * 1975-01-11 1976-08-06 Doublefell Ltd Machine a laver
EP0038671A2 (de) * 1980-04-16 1981-10-28 Servis Domestic Appliances Limited Verfahren und Maschinen zum Waschen textiler Artikel
FR2588581A1 (fr) * 1985-10-11 1987-04-17 Ciapem Lave-linge ou seche-linge a tambour tournant dans les deux sens

Also Published As

Publication number Publication date
IT8822362A0 (it) 1988-10-20
IT1229944B (it) 1991-09-17

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