WO2000074205A2 - Procede et circuits permettant de reguler la puissance d'une machine a reluctance a deux phases, commutee electroniquement - Google Patents

Procede et circuits permettant de reguler la puissance d'une machine a reluctance a deux phases, commutee electroniquement Download PDF

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Publication number
WO2000074205A2
WO2000074205A2 PCT/RO2000/000011 RO0000011W WO0074205A2 WO 2000074205 A2 WO2000074205 A2 WO 2000074205A2 RO 0000011 W RO0000011 W RO 0000011W WO 0074205 A2 WO0074205 A2 WO 0074205A2
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WO
WIPO (PCT)
Prior art keywords
phase
power control
control method
current
voltage
Prior art date
Application number
PCT/RO2000/000011
Other languages
German (de)
English (en)
Inventor
Jancu Lungu
Original Assignee
Jancu Lungu
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
Priority claimed from RO99-00602A external-priority patent/RO119917B1/ro
Application filed by Jancu Lungu filed Critical Jancu Lungu
Priority to EP00931778A priority Critical patent/EP1101268A1/fr
Priority to CN00801360.8A priority patent/CN1636308B/zh
Priority to BR0006162-0A priority patent/BR0006162A/pt
Priority to US09/744,645 priority patent/US6864657B1/en
Publication of WO2000074205A2 publication Critical patent/WO2000074205A2/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/02—Synchronous motors
    • H02K19/10—Synchronous motors for multi-phase current
    • H02K19/103—Motors having windings on the stator and a variable reluctance soft-iron rotor without windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • 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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • H02P25/086—Commutation
    • H02P25/089—Sensorless control
    • 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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • H02P25/092—Converters specially adapted for controlling reluctance motors
    • H02P25/0925—Converters specially adapted for controlling reluctance motors wherein the converter comprises only one switch per phase
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/005—Machines with only rotors, e.g. counter-rotating rotors

Definitions

  • the invention relates to electronically commutated, two-phase reluctance machines (motors or generators, also called SR (Switched Reluctance) machines) which have a special one
  • Each one of the eight main (112) like secondary windings (1 13) is outlined as one on the
  • Magnetic yoke 11 attached inductance shown.
  • circuit breakers For the sake of simplicity, in the course of the description the semiconductor components such as Mosfets, IGBTs, which conduct the main current from the current source to the windings, are called “circuit breakers”.
  • Main current in the sense of the invention is understood to mean the current which flows from the source via a circuit breaker in the windings.
  • the flow duration of the main current is equal to the phase duration T at full load (flip-flop operation of the circuit breakers) and is as electrical angle seen 180 °.
  • the phase change is carried out with the aid of a rotor position sensor 32, which rotates in front of one or more of the rotor position (Hall) sensors 31.
  • Fig. 2 shows an overview of the arrangement of some components relevant to the invention with the signal forms for the engine control that occur in the course of the invention.
  • phase control see Fig. 2 the circuit parts are understood which control the phase change in flip-flop mode. This must take place in the rotor positions in which the efficiency of the conversion of electrical / mechanical energy is optimal with the given operating parameters.
  • the power control includes the circuit parts which form gate control signals from rotor position signals, which are rectangular and last less than the phase length, as shown in FIG. 2, right.
  • “By-pass diodes” are the diodes which supply the self-induction voltage Ua, which occurs at the connection between the circuit breakers and the windings when the main current is interrupted (the demagnetizing energy, or by-pass current) Ib, to the subsequent phase.
  • Ton-tooth or “alligned position” is the relative rotor-stator position in which the rotor 2 rotates if direct current flows continuously through a phase (minimal reluctance).
  • the object of the present invention is to show possibilities of the power control of the above-mentioned SR machines without additional, costly power semiconductors. It should be taken into account that the efficiency of the machine should remain as high as possible. This means that both the recovery of the demagnetizing energy should be done efficiently and that the losses of the power electronics are minimized.
  • FIG. 3 shows the relevant control signals of the
  • the first switch-off takes place (flip-flop mode, "chaining" of the phases via the by-pass current).
  • Interrupt phase end The current flow in this phase to be switched off should be maintained until the end of the phase duration by the feedback of the self-induction voltage Ua with the aid of two additional power transistors 21 1, see FIG. WO 96/09683, pp. 8-9, Fig. 6e.
  • the main current can be delayed by holding the circuit breaker 21X, 21 Y locked after the phase change by a fixed or variable time period t be, (s. Fig. 3. right), a period of time that corresponds to an electrical angle v depending on the speed of the motor.
  • phase X therefore no longer sets at 360 °, but decelerates at 360 + v °, that of the Y phase at 540 + v °.
  • circuit breakers are still locked at nxl 80 °.
  • the demagnetization energy (the by-pass current Ib, curve see Fig. 3, dotted line) can thus the subsequent phase via the by-pass diode 22 with a useful effect (as
  • a targeted blocking of the circuit breaker 21 of the X phase e.g. can be used in such a way that, due to the "concatenation" of the phases via the by-pass current, an appropriate premagnetization of the Y phase can be achieved via the diode 22X.
  • phase switching processes e.g. in addition to the power control to achieve a certain current profile in the phases, which for optimal efficiency and / or for a
  • variable switch-on delay t of the circuit breaker 21 can take place electronically or via the mechanical displacement of a second Hall sensor 31 a. This can be achieved electronically with a delayed switch-on timer which is used for
  • Time t holds to the minus potential after the phase change. (see Fig. 3).
  • the main current angle / phase angle is reduced.
  • the gate electrode of the circuit breaker 21 is above the first Hall sensor (31)
  • Hall sensor 31 control signals of gate Gx when switch 314 is open, 315 closed) or at level b that of the output of hall sensor 31 a (switch 315 open, 314 closed).
  • this power regulation can be more favorable for the motor of a power tool.
  • the speed is increased by pressing the integrated switch near the motor, which in this case contains a potentiometer.
  • Such a switch can also cause the movement of a Hall sensor via a lever, for example, so that the power control function of the tool (see Fig. 5) can be represented as follows: ⁇ -Depending on the desired direction of rotation, using the bistable left-right selector lever 36, the position for a start-up sensor 31 a relative to the transmitter magnet 32 is predetermined, with switching points that lie approximately in the first quarter of the phase angle, left or right of the neutral tooth. Tooth position, -At the beginning of the stroke of the lever 37, the start-up (Hall) sensor 31a is activated, for example, as shown in FIG.
  • the motor starts in the preselected direction, -After reaching the lower speed limit, the second Hall sensor 31 activated, which, however, has the maximum angular displacement v, so that the main flow angle is small, and the motor operates with minimum power (or speed), - by pushing the lever 37 further, one of the Hall sensors 31 is moved as in FIG. 5 in such a way that the displacement v is reduced so that the main current angle increases and thus the performance of the motor.
  • the motor operates at full load (main current and phase angles are the same, flip-flop operation).
  • the movable Hall sensor 31 can be of the output size of a driven device (vacuum, Flow, temperature, current, vibration) can be adjusted depending on the B. for pressure with the help of a cylinder-piston-spring device 38, which allows particularly inexpensive overall solutions for the control (see Fig. 6).
  • the vibrations of the gasoline engine can be dampened with the help of a Hall sensor, which is mounted free of torsional vibrations.
  • Hall sensors 31 analog, digital, differential, programmable
  • FIG. 3 shows, where, as a comparison, the flip-flop phase change signal of an uncontrolled one
  • Sawtooth signals of this type can e.g. with the help of an analog Hall sensor 31c, which is polarized by a permanent magnet 33 and radially in front of one with the
  • the rotor is in solidarity rotating, soft magnetic "sawtooth disk” 32a (Fig. 6).
  • the magnetic field that drives the Hall sensor changes (the reluctance of the system)
  • Phase control trigger has this shape.
  • a level switch 34 (Schmidt Trigger, see Fig. 2 and 3) can be used
  • Phase change signal (flip-flop) can be obtained when the trigger is in the middle of the
  • phase symmetry can easily be influenced by adjusting the breakover voltage Uk without the phase position (when falling back after the tooth tip) changing.
  • Phase symmetry means that the duration of the "high" phases at both X and Y outputs, ie at the gate electrodes Gx, Gy of the circuit breakers 2 IX, 21 Y, is always the same, be it in flip-flop or in power control mode. This is necessary in order to keep the currents of the two phases the same for the smooth running of the machine.
  • the breakover voltage Uk of the trigger 34 is adjusted such that a phase symmetry is established.
  • the voltage Ud is the potential difference across two capacitors Cx, Cy which are connected via resistors Rx, Ry, to the gate electrodes Gx, Gy, the circuit breaker, are charged or discharged alternately and assume a voltage level which corresponds to the ratio of the on / off Duration of the respective switch 2 IX. 21 Y corresponds.
  • This phase duration signal can also be used as an analog speed signal in flip-flop mode (e.g. when the machine starts up).
  • one (or more) current loop 322 is introduced, which e.g. is traversed by the main current of a phase or by a suitable control current.
  • phase change Depending on the current direction of current flow and strength, the magnetic field, which controls the Hall sensor 31 and thus the phase change, is influenced, so that feedback occurs between the main current Ip and the phase change.
  • This enables a load-dependent adjustment of the phase change points as feedback.
  • Such adjustment of the phase change can also be carried out with electronic means of phase shift (known from the prior art) in other areas if it is useful for optimizing the efficiency or for regulating the motor. For that it is e.g. B. cheap to gain a sine signal from an analog Hall sensor (Fig. 3, level d), because this can be processed more easily for the purpose of phase shift.
  • the means described in connection with FIG. 3 and the means of phase adjustment known from the prior art can be used, for example.
  • a phase change in the vicinity of the tooth-gap position (see Fig. 1, corners of the rotor and stator teeth of phase X) is favorable for starting the motor; however, the shift in the phase change with respect to this position should increase with increasing speed. For example, it is advantageous to use a speed (voltage) signal that increases easily with the switching frequency to cause a larger phase shift in the phase change.
  • the rotating magnetic field (the motor effect) of the machine arises from the superposition of the main current Ip and the by-pass current Ib, which always after the interruption of the
  • the second half of the machine has the same minus connection as the first and is identical to this.
  • the dashed, diagonally drawn diodes "22" show the possible
  • Avalanche mode are absorbed by the circuit breakers 21 and endanger them, d) - iron losses, which are roughly related to the losses under a) and b).
  • the current drawn by the motor has a lower ripple, and possibly to
  • Fig. 3 -level a, b show typical courses of the
  • the current peaks Is at the end of the phase can be e.g. by reducing that to the phase position t2, (see plane a and e), where the main current Ip has a lower value, the gate of
  • Circuit breaker 21 is short-circuited for the time t3 at the minus potential (ground), which reduces the main current, in particular in the rear area, see FIG. Level e.
  • the power control ensures that the speed does not drop and reduces t to tl, whereby the main current remains at the nominal value, but without the pronounced peak Is, which can contribute to an increase in efficiency.
  • the restart of the main current can, for. B. take place when the by-pass current has dropped to a predetermined value.
  • This starting current limitation can also function as a protective function and is carried out, for example, with the aid of a transistor 42, see. Fig. 9.
  • Blocking the transistor 41 the gate will get a positive potential (21 becomes conductive) as soon as the voltage applied to the power switch 21 approaches the avalanche value and thereby exceeds the zener voltage.
  • the gate is via the open-colector output of the Hall sensor 31 (
  • Phase control and additionally controllable via a series (41) or a parallel transistor 42.
  • the gate control can be decoupled from the phase control, if necessary, in order, for. B. to realize the most important operational and protective functions of the motor, such as: a) - on / off switching, b) - power and speed control c) - over- and undervoltage protection, d) - thermal shutdown, current limitation, and short-circuit protection, e ) Protection against inductive voltage spikes, as already mentioned. f) braking
  • the transistor 42 takes over protective functions and should short-circuit the gate at the minus potential if one of the states listed under c) or d) occurs.
  • a reluctance machine is known from WO 96/09683, which does not have a stator but two independent rotors 1, 2, the former, the field rotor 1, as shown in FIG. 10 (a rotating one
  • Stator similar), over two brushes 34 or. Slip rings are supplied with the main current Ip.
  • the field rotor carries on the frame 5 the circuit breakers 21 and part of the phase and speed control, which are therefore movable and inaccessible for adjustment from the outside. For this type of settings, contactless transmission is necessary.
  • the two by-pass diodes (in series with the by-pass windings 1 13) were replaced with the same function by a single diode 221, the cathode of which is connected directly to the positive connection.
  • control of the gate electrodes of the power switches 21 must be decoupled from the phase changeover at the beginning of the phase.
  • Circuit breaker of the active phase of the motor switches "low".
  • 30 Fig. 11 shows between the circuit of an engine (left of the dashed line) and the
  • Level switch (here Schmitt trigger, right of the dotted line) is an example of the implementation
  • the two phase X and Y motor has main windings 112 in series with that
  • Circuit breakers 21 (both provided with an inverse diode) through which the main current Ip flows.
  • the secondary windings 1 13 are traversed by the by-pass current Ib, which flows through the by-pass diode 221 to the positive line.
  • the complementary outputs Hx, Hy of the Hall sensor 31, in front of which the sensor magnet 32 rotates, are connected to the “pull-up” resistors Rt in order to receive signals for the regulation. These charge the capacitors Ct during the "high” time of the outputs Hx, Hy of the Hall sensor 31.
  • Diodes De and the resistor Re a current It which tilts the Schmitt trigger ST.
  • the output transistor Ta becomes conductive.
  • the respective gate electrode of the active power switch 21 remains connected to the -potential for the time t via the diodes Dt or the transistor Ta and the low-resistance resistor R1, that is to say “low”.
  • the delay t of the main current Ip is set by the potentiometer Pt, which conducts an adjustable current Is towards the base of the input transistor Te
  • Output transistor Ta blocks, so that the respective gate of the power switch 21 on the
  • Resistor Rg can be "pulled up".
  • the circuit breaker 21 thereby becomes conductive, the main current Ip therefore begins in the sense of the invention after the delay t.
  • the speed control circuit (on the right of the dashed line) can be attached to a separate circuit board that can be connected to an uncontrolled motor (e.g. via a plug connection). The same also applies to the circuit according to FIG. 12.
  • influence on the base current Ie can be exerted in a variety of ways in order to refine the functions of the control or to protect the motor.
  • a control current can be fed in or withdrawn, either to influence the delay t (feedback functions e.g.) or the motor in the case
  • the deceleration t (the speed of the motor) can, for example, be influenced in the following situations:
  • the speed of the motor can be adjusted via the switching frequency at the output of the phase control
  • At least one of the signals of predetermined voltage at the output of the phase control is fed via a capacitor Ca (approximately 0.1 ⁇ F) to a circuit which charges the charge-discharge currents of the capacitor Ca via two Separates diodes D +, D- and integrates them to charge two capacitors C +, C- (5-1000 ⁇ F) with parallel connections
  • the positive or negative charging of the capacitors C + or C- is proportional to the speed and each of these voltages can be used for control purposes if required.
  • a potentiometer Pi is connected to the connection points between the diodes D +, -, n D- and the capacitors C +, C-, the cursor can be used to set a (feedback) signal that can be adjusted from negative to positive win, which is proportional to the speed and can be supplied, for example, as a feedback current to the input of the Schmitt trigger ST.
  • the values of the discharge resistors Rd or the capacitors C +, C- are selected such that one of the capacitors C +, C- reaches the voltage which corresponds to the speed of the motor more slowly.
  • the signal tapped at the potentiometer Pi has a slower change after the motor is switched on and can therefore be used to gradually reduce the delay t, ie to bring about a smooth start.
  • FIG. 12 shows a circuit which enables speed control and limitation by means of the switch-on delay described above, in which this delay is controlled by means of a voltage which increases with the speed.
  • this circuit has components (Rg, Dt, Rc, Ct, ST) which correspond to those of FIG. 11 and have been described in connection with this.
  • the capacitors Ct are charged or discharged via two pairs of diodes D +, D-.
  • the positive portion of the currents flowing through the capacitors Ct charges the integration capacitor Cv via the diodes D + or the resistor Rv, so that its average charging voltage is proportional to the speed.
  • the resistor R1 serves to discharge the capacitors Ct via the diodes D- when the respective outputs Hx, Hy, of the Hall sensor 31 are at the negative potential.
  • the capacitance of this capacitor Cv and the resistance Rv are selected so that a voltage Uv, the middle one, arises at the cathode of the diodes D +
  • Resistor Rv arises) to switch transistor Tv within the phase duration.
  • the resistor Rf and the capacitor Cf serve to remove any potential from this voltage Uv
  • the state of charge of the capacitor Cv i.e. the rate of increase of this voltage with the speed, can be adjusted with the help of the potentiometer Pv, so that a
  • the value at the capacitor Cv is low enough so that the transistor Tv does not become conductive even at the beginning of the phase (when the capacitors Ct are in the charging phase).
  • the transistor Tv becomes conductive at the beginning of the phase and blocks the conductive polarized transistor Te of the Schmitt trigger, so that the output transistor Ta thereby becomes conductive.
  • the gate electrodes of the circuit breakers 21 thus remain connected to the ground and the latter (21) is blocked. If after a delay t the voltage across the capacitor Ct rises, the voltage Uv drops sufficiently for the transistor Tv to block. This also blocks the output transistor Ta and the corresponding power switch 21 becomes conductive after the delay t. This process is repeated for each phase and the delay t takes on a value based on the described processes, which corresponds to the set speed. Because the charging voltage of the capacitor Cv influences the main current, the load state of the motor can be reduced or controlled by increasing this voltage, regardless of the speed.
  • control influences can intervene to increase or decrease the voltage.
  • the status of the machine can be checked depending on various parameters on the gate electrodes Gx, Gy of the machine. Given the circuits according to Fig.l 1-13, however, it is easier to achieve the functions described under a) to f) by not influencing the control parameters directly, but at the input of the level switch ST or at the input of the driver modules of the individual phases .
  • Fig. 13 shows a further circuit, where in principle the function of the Schmitt trigger including the inverting transistor according to Fig. 12 is implemented via two special control modules / phase (with threshold switch function, here Mosfet driver, eg the Micrel type (Mic 445 IB)) has been.
  • Mosfet driver eg the Micrel type (Mic 445 IB)
  • a Mosfet driver Dr / Phase each with the inverting output O connected to the gate replaces Schmitt trigger ST and inverting transistor Tv.
  • the diodes Dl and the pull-up resistors Rg for the gate electrodes are dispensed with, because the outputs O of the two Mosfet drivers DrX, DrY, the gate electrodes Gx, Gy are opened and closed directly via bidirectional currents unload.
  • the outputs of the Hall sensor 31 control the inputs I of the Mofsfet drivers in such a way that their outputs are .low ' " (switch 21 blocked) when the respective output of the Hall sensor 31 (phase switch) is" high ".
  • the voltage Uv increases and the inputs of the drivers (DrX) briefly get values of the voltage Uv that are above the input threshold of the drivers (approx.1.5V), so that their outputs (the Gate electrodes) only after this voltage has decayed, ie after a delay t. ..high "so that the engine works in power control mode.
  • the energy recovery is with a vehicle drive or with a battery operated one
  • SR motors of the invention can be used without further measures

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

La présente invention concerne des procédés et des circuits permettant de réguler la puissance de machines à réluctance, commutées, à deux phases et fonctionnant avec un angle de phase de 180° à pleine charge et une récupération directe de l'énergie de démagnétisation des phases interrompues. La régulation de puissance repose physiquement sur une diminution du temps de parcours du courant en début de phase. Cette diminution peut être réalisée par le décalage mécanique d'un second capteur de Hall ou par utilisation de moyens électroniques (circuits de temporisation).
PCT/RO2000/000011 1999-05-26 2000-04-21 Procede et circuits permettant de reguler la puissance d'une machine a reluctance a deux phases, commutee electroniquement WO2000074205A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP00931778A EP1101268A1 (fr) 1999-05-26 2000-04-21 Procede et circuits permettant de reguler la puissance d'une machine a reluctance a deux phases, commutee electroniquement
CN00801360.8A CN1636308B (zh) 1999-05-26 2000-04-21 用于控制电子换向的两相磁阻电机的方法
BR0006162-0A BR0006162A (pt) 1999-05-26 2000-04-21 Processos e circuitos para regulagem de potência de uma máquina de relutância bifásica, comutada eletronicamente
US09/744,645 US6864657B1 (en) 1999-05-26 2000-04-21 Method and circuits for controlling the power of an electronically switched, two-phase reluctance machine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
RO99-00602 1999-05-26
RO99-00602A RO119917B1 (ro) 1999-05-26 1999-05-26 Metodă de reglare a puterii unei maşini de reluctanţă cu două faze, cu comutaţie electronică
RO0000432 2000-04-21
ROA200000432 2000-04-21

Publications (1)

Publication Number Publication Date
WO2000074205A2 true WO2000074205A2 (fr) 2000-12-07

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PCT/RO2000/000011 WO2000074205A2 (fr) 1999-05-26 2000-04-21 Procede et circuits permettant de reguler la puissance d'une machine a reluctance a deux phases, commutee electroniquement

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Country Link
EP (1) EP1101268A1 (fr)
BR (1) BR0006162A (fr)
WO (1) WO2000074205A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1981165A3 (fr) * 2007-03-22 2017-03-29 Vorwerk & Co. Interholding GmbH Procédé de commande d'un moteur à reluctance
CN108574481A (zh) * 2017-03-13 2018-09-25 泰科电子(上海)有限公司 电子感应开关电路、电子感应开关系统及供电电路

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1981165A3 (fr) * 2007-03-22 2017-03-29 Vorwerk & Co. Interholding GmbH Procédé de commande d'un moteur à reluctance
CN108574481A (zh) * 2017-03-13 2018-09-25 泰科电子(上海)有限公司 电子感应开关电路、电子感应开关系统及供电电路
CN108574481B (zh) * 2017-03-13 2024-03-01 泰科电子(上海)有限公司 电子感应开关电路、电子感应开关系统及供电电路

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BR0006162A (pt) 2001-05-02
EP1101268A1 (fr) 2001-05-23

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