[특허]Soft starting system for an electrical motor

Soft starting system for an electrical motor 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02P-001/16 H02P-001/42
출원번호	US-0201796 (2016-07-05)
등록번호	US-9948215 (2018-04-17)
우선권정보	FR-15 58204 (2015-09-04)
발명자 / 주소	Dentella, Alain Penkov, Delcho
출원인 / 주소	SCHNEIDER ELECTRIC INDUSTRIES SAS
대리인 / 주소	Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보	피인용 횟수 : 0 인용 특허 : 33

초록 ▼

Starter system for an electric motor (M) supplied by an electrical network (1), the starter system comprising an electronic control circuit (7) and an electronic switch (10) for controlling one phase of the motor (M), the electronic switch (10) being controlled by the control circuit (7). The starter system comprises a sensor (3) intended to deliver an analog signal (4) that is representative of the derivative of a current flowing through the phase of the motor (M), a detection board (5) comprising means for transforming said analog signal (4) into a binary signal (6) that is representative of the changes in sign of said analog signal, and comprising means for transmitting said binary signal to the control circuit (7), so as to optimize the control of the electronic switch (10).

대표청구항 ▼

1. A starter system for an electric motor supplied by a high-voltage electrical network, the starter system comprising: an electronic control circuit;an electronic switch to control one phase of the electric motor, the electronic switch being controlled by the electronic control circuit;a sensor to deliver an analog signal that is representative of a derivative of a current flowing through the one phase of the electric motor; anda detection board between the electronic control circuit and the sensor, the detection board including circuitry configured to:transform the analog signal into a binary electrical signal that is representative of changes in sign of the analog signal,convert the binary electrical signal into a binary optical signal, andtransmit the binary optical signal to the electronic control circuit to control the electronic switch,wherein the binary optical signal is transmitted to the electronic control circuit via optical fiber without implementing a link using a communication protocol. 2. The starter system according to claim 1, wherein the circuitry of the detection board filters the analog signal. 3. The starter system according to claim 1, wherein the electronic control circuit converts the received binary optical signal to a binary electrical signal. 4. The starter system according to claim 1, wherein the electrical switch includes two thyristors connected back to back and in parallel with a damping circuit having a resistor in series with a capacitor. 5. The starter system according to claim 1, wherein the sensor is a Rogowski torus surrounding the one phase of the electric motor. 6. The starter system according to claim 1, wherein the detection board is placed in the immediate proximity of the sensor at a distance of less than 50 cm. 7. The starter system according to claim 1, wherein the electric motor is a three-phase motor, and the starter system comprises three of said electronic switches that are controlled by the electronic control circuit to respectively control each of the three phases of the electric motor. 8. The starter system according to claim 7, wherein the sensor is a single shared sensor surrounding the phases of the electric motor, and the detection board is a single detection board connected to the single shared sensor and transmits a single binary optical signal as said binary optical signal to the electronic control circuit. 9. The starter system according to claim 7, further comprising three of said sensors surrounding each said phase of the electric motor and respectively delivering the analog signal for each said phase of the electric motor. 10. The starter system according to claim 9, further comprising three of said detection boards, each said detection board being connected to a respective one of said sensors and respectively transmitting three of said binary optical signals to the electronic control circuit. 11. The starter system according to claim 9, wherein the detection board is a single shared detection board, the single shared detection board being connected to the three sensors and transmitting a single shared binary optical signal as said binary optical signal to the electronic control circuit, the shared binary optical signal being representative of the changes in sign of the three analog signals.

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