WO2020182115A1 - 继电器装置的驱动电路以及继电器装置 - Google Patents

继电器装置的驱动电路以及继电器装置 Download PDF

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Publication number
WO2020182115A1
WO2020182115A1 PCT/CN2020/078541 CN2020078541W WO2020182115A1 WO 2020182115 A1 WO2020182115 A1 WO 2020182115A1 CN 2020078541 W CN2020078541 W CN 2020078541W WO 2020182115 A1 WO2020182115 A1 WO 2020182115A1
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temperature
relay
relay device
circuit
module
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English (en)
French (fr)
Inventor
贾晓雨
茅昕辉
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Tyco Electronics Shanghai Co Ltd
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Tyco Electronics Shanghai Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/32—Energising current supplied by semiconductor device

Definitions

  • the utility model relates to a driving circuit of a relay device and a relay device.
  • relays have been used more and more widely in industrial control systems. They can usually be used in automated control circuits. They are actually an "automatic switch” that uses small currents to control large current operations. . Therefore, it can play the role of automatic adjustment, safety protection, and conversion circuit in the circuit.
  • the coil drive requires a relatively large drive current, but if the sustain current is too large, the coil may be burned. But when driving, it is not easy to directly adjust the current. Therefore, it is necessary to adjust the drive current of the relay in a suitable way to be suitable for various applications.
  • the utility model provides a driving circuit of a relay device and a relay device.
  • a drive circuit of a relay device includes a relay switch circuit and a temperature feedback circuit.
  • the relay switch circuit includes a relay drive circuit formed by a power supply, a relay coil, and a source/drain of a MOS tube connected in sequence.
  • the temperature feedback circuit It includes a temperature acquisition module and a control circuit module.
  • the temperature acquisition module collects the temperature information of the relay coil and transmits it to the control circuit module.
  • the control circuit module performs pulse width modulation according to the temperature information and adjusts the The pulse width modulation signal is output to the gate of the MOS tube.
  • the temperature collection module includes a temperature sensor, and the temperature sensor is arranged on the relay coil.
  • the temperature collection module further includes an analog-to-digital conversion circuit, and the temperature information collected by the temperature sensor is an analog signal, which is connected to the control after being converted by the analog-to-digital conversion circuit. Circuit module.
  • the temperature sensor is attached to the relay coil or the temperature sensor is installed in the housing of the relay.
  • the temperature sensor is a contact thermal resistance sensor, a contact thermocouple sensor or a non-contact infrared temperature sensor.
  • control circuit module outputs a voltage signal.
  • a reverse bias diode is arranged between the two source/drain of the MOS tube.
  • a pull-up resistor is provided between the temperature acquisition module and the control circuit module.
  • control circuit module adjusts the duty cycle of the pulse width modulation signal according to the temperature information.
  • the adjusted pulse width modulation signal when the relay coil is at a high temperature, maintains the contacts of the relay device in a closed position; when the relay coil is at a low temperature, the The adjusted pulse width modulation signal prevents the relay coil from burning out.
  • the duty cycle of the adjusted pulse width modulation signal ranges from 20% to 30%.
  • the collection temperature range of the temperature collection module is -40°C to 85°C.
  • the operating temperature range of the relay coil is -40°C to 85°C.
  • a relay device which adopts the driving circuit of the relay device as described above.
  • the relay device is a contactor.
  • the contactor includes a housing and a circuit board, the drive circuit of the relay device is arranged in the housing, and the relay switch circuit and the temperature feedback circuit are respectively arranged in the Circuit board.
  • the utility model provides a driving circuit for a relay device.
  • a temperature feedback circuit is provided to provide closed-loop feedback under different temperature conditions for the relay switch circuit.
  • a temperature acquisition module is used to detect the temperature of the relay coil, thereby passing The control circuit module outputs the pulse modulation signal of the corresponding duty cycle, thereby ensuring that the relay coil will not burn out, and the contacts of the relay device will not be unable to maintain closed due to the driving current being too small.
  • FIG. 1 is a schematic block diagram of the driving circuit of the relay device of the embodiment
  • Fig. 2 is a schematic circuit diagram of the driving circuit of the relay device of the embodiment
  • Fig. 3 is a schematic diagram of the structure of the contactor of the embodiment.
  • the relay device of the present invention can be a relay, a contactor, or other similar electrical components.
  • the following embodiments take relays or contactors as examples for description. However, those skilled in the art should understand that the present invention is not limited to relays or contactors.
  • the MOS tube of the present invention can be a triode or other similar electrical components.
  • the following embodiments take a MOS transistor as an example for description. However, those skilled in the art should understand that the present invention is not limited to MOS transistors.
  • the drive circuit of the relay device provided in this embodiment is mainly divided into two parts of circuits, including the relay switch circuit 10 on the left and the temperature feedback circuit 20 on the right.
  • the relay switch circuit includes The relay drive circuit formed by the power supply, the relay coil and the source/drain of the MOS tube.
  • the MOS tube is used as a switching device for whether the relay coil is powered on or not.
  • the gate of the MOS tube is connected to the switching signal, and the source/drain end of the MOS tube Connect the relay coil, and the other end can be grounded.
  • a closed-loop feedback circuit about temperature is provided in the relay coil.
  • the temperature feedback circuit includes a temperature acquisition module and a control circuit module.
  • the temperature acquisition module collects the The temperature information on the relay coil is transmitted to the control circuit module, and the control circuit module performs pulse width modulation according to the temperature information, and outputs the adjusted pulse width modulation signal to the gate of the MOS tube, namely The control circuit module outputs a pulse width modulation (PWM) signal to the gate of the MOS tube.
  • PWM pulse width modulation
  • the driving voltage adopts PWM (Pulse Width Modulation) method to drive the coil of the relay/contactor, which can be driven by a larger duty cycle or a constant DC voltage in the initial state.
  • PWM Pulse Width Modulation
  • the coil of a relay/contactor is usually wound with copper wire, and its resistance increases by 0.4% per degree Celsius. When the temperature rises, using the same drive voltage will cause the current to flow through the relay coil to decrease. If the duty cycle is too small, the relay or contactor will not be able to maintain its contact closure. Therefore, in order to avoid the coil cannot be closed, the duty cycle of the drive will be selected as large as possible. However, an excessively large duty cycle will cause a large amount of heating of the coil at low temperatures, which will accelerate the aging of the contactor, shorten the service life of the product, and may even burn the coil.
  • the utility model adopts a temperature acquisition module to detect the temperature on the relay coil.
  • the temperature acquisition module includes a temperature sensor, and the temperature sensor is arranged on the relay coil.
  • the temperature acquisition module also includes an analog-to-digital conversion circuit, the temperature signal collected by the temperature sensor is an analog signal, and the signal represented by the temperature is generally a continuous analog signal, which usually needs to be converted into a digital signal that is convenient for signal processing. After being converted by the analog-to-digital conversion circuit, it is connected to the control circuit module, and the detected temperature signal is processed by the analog-to-digital conversion circuit and then converted into a voltage signal and transmitted to the control circuit module.
  • the control circuit module may adopt a microprocessor/ The single-chip microcomputer (MCU), that is, the control circuit module is implemented by calling the internal circuit of the MCU, and the single-chip microcomputer can call the voltage signal of the temperature information for PWM duty cycle adjustment calculation.
  • MCU microprocessor/ The single-chip microcomputer
  • the temperature sensor is attached to the relay coil or the temperature sensor is installed in the housing of the relay, that is, the temperature sensor element can be directly arranged on the contactor coil, or Without direct contact with the coil, the temperature of the relay coil can be obtained indirectly by detecting the temperature of the relay/contactor cavity.
  • the temperature sensor is a contact thermal resistance sensor, a contact thermocouple sensor, or a non-contact infrared temperature sensor, that is, the temperature detection method can be either a contact type such as a positive temperature coefficient sensor, a negative temperature coefficient sensor, etc., or infrared And other non-contact temperature sensor detection.
  • the control circuit module outputs a voltage signal, and the control circuit module adjusts the duty cycle of the pulse width modulation signal according to the temperature information.
  • T is the coil temperature.
  • T is the coil temperature
  • T1 is the high temperature limit that the coil can withstand (such as 85°C)
  • D is the duty cycle corresponding to T1.
  • the temperature acquisition module will detect the temperature of the relay coil, and the corresponding driving duty cycle can be obtained according to the above formula, so as to ensure that the relay/contactor coil will neither burn out nor be caused by too small driving current The contact cannot be maintained closed.
  • the adjusted pulse width modulation signal maintains the contacts of the relay device in a closed position, and when the relay coil is at a low temperature, the adjusted pulse width modulation signal prevents The relay coil burned out.
  • the collection temperature range of the temperature collection module is -40°C to 85°C; the operating temperature range of the relay coil is -40°C to 85°C.
  • a reverse-biased diode is set between the two source/drain of the MOS tube, which can be set as a Zener diode.
  • the current changes in a wide range but the voltage Basically remain unchanged, can play a role in protecting the MOS tube.
  • a pull-up resistor R2 is provided between the temperature acquisition module and the control circuit module, so that Connect an uncertain signal to a high level through a resistor, so that the signal is initially high.
  • the present utility model also provides a relay, the relay device adopts the driving circuit of the above-mentioned relay device, that is, the purpose of reducing the power consumption of the relay is achieved, so that the relay device is operated in a high temperature environment while ensuring the relay device's performance The temperature rise is controlled within a safe range, which can extend the service life of the relay.
  • the relay device is a contactor.
  • the contactor includes a housing and a circuit board, the drive circuit of the relay device is arranged in the housing, and the relay switch circuit and the temperature feedback circuit are respectively arranged in the housing.
  • the circuit board is a circuit board.
  • the utility model provides a driving circuit of a relay device.
  • the temperature feedback circuit is set to provide closed-loop feedback under different temperature conditions for the relay switch circuit.
  • a temperature acquisition module is used to detect the temperature of the relay coil, thereby controlling The circuit module outputs the pulse modulation signal of the corresponding duty cycle, thereby ensuring that the relay coil will not burn out, and the contact of the relay device will not be unable to maintain closed due to the driving current being too small.

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Abstract

一种继电器装置及其驱动电路，驱动电路包括继电器开关电路(10)和温度反馈电路(20)，继电器开关电路具有继电器驱动回路，温度反馈电路包括温度采集模块和控制电路模块，温度采集模块采集继电器线圈的温度信息并传输到控制电路模块，控制电路模块根据温度信息进行脉宽调制，并将调节后的脉宽调制信号输出到MOS管的栅极。该继电器装置的驱动电路，通过设置温度反馈电路来为继电器开关电路提供不同温度条件下的闭环反馈，采用温度采集模块检测继电器线圈的温度，从而通过控制电路模块输出对应的占空比的脉冲调制信号，进而保证继电器线圈既不会烧毁，也不会由于驱动电流过小导致继电器装置的触点无法维持闭合。

Description

继电器装置的驱动电路以及继电器装置 技术领域
本实用新型涉及一种继电器装置的驱动电路以及继电器装置。
背景技术
随着工来社会的发展，继电器在工业控制系统中得到越来越广泛的应用，通常可应用于自动化的控制电路中，它实际上是用小电流去控制大电流运作的一种“自动开关”。故在电路中可起到自动调节、安全保护、转换电路等作用。继电器在闭合时，线圈驱动需要的驱动电流较大，但维持电流如果过大可能会导致线圈烧毁。但在驱动时，直接调节电流并不容易。因此，需要通过合适的方式来调节继电器的驱动电流以适用于各种应用场情。
实用新型内容
本实用新型为改善继电器的驱动电流，提供一种继电器装置的驱动电路以及继电器装置。
为实现以上目的，本实用新型通过以下技术方案实现：
一种继电器装置的驱动电路，包括继电器开关电路和温度反馈电路，所述继电器开关电路包括依次连接的电源、继电器线圈和MOS管的源/漏极所形成的继电器驱动回路，所述温度反馈电路包括温度采集模块和控制电路模块，所述温度采集模块采集所述继电器线圈的温度信息并传输到所述控制电路模块，所述控制电路模块根据所述温度信息进行脉宽调制，并将调节后的脉宽调制信号输出到所述MOS管的栅极。
根据本实用新型的一个实施方案，所述温度采集模块包括温度传感器，所述温度传感器设置在所述继电器线圈上。
根据本实用新型的一个实施方案，所述温度采集模块还包括模数转换电路，所述温度传感器采集的所述温度信息为模拟信号，经过所述模数转换电路的转换后连接到所述控制电路模块。
根据本实用新型的一个实施方案，所述温度传感器贴附设置在所述继电器线圈上或所述温度传感器安装设置在继电器的外壳内。
根据本实用新型的一个实施方案，所述温度传感器为接触式热电阻传感器、接触式热电偶传感器或非接触式红外温度传感器。
根据本实用新型的一个实施方案，所述控制电路模块输出电压信号。
根据本实用新型的一个实施方案，所述MOS管的两个源/漏极之间设置反偏二极管。
根据本实用新型的一个实施方案，所述温度采集模块与所述控制电路模块之间设置一上拉电阻。
根据本实用新型的一个实施方案，所述控制电路模块根据所述温度信息调节所述脉宽调制信号的占空比。
根据本实用新型的一个实施方案，当所述继电器线圈处于高温时，所述调节后的 脉宽调制信号将所述继电器装置的触点维持在闭合位置；当所述继电器线圈处于低温时，所述调节后的脉宽调制信号防止所述继电器线圈烧毁。
根据本实用新型的一个实施方案，所述调节后的脉宽调制信号的占空比的范围为20％－30％。
根据本实用新型的一个实施方案，所述温度采集模块的采集温度范围为-40℃到85℃。
根据本实用新型的一个实施方案，所述继电器线圈的工作温度范围为-40℃到85℃。
根据本实用新型的另一方面，提供了一种继电器装置，所述继电器装置采用如上所述的继电器装置的驱动电路。
根据本实用新型的一个实施方案，所述继电器装置为接触器。
根据本实用新型的一个实施方案，所述接触器包括壳体和电路板，所述继电器装置的驱动电路设置在所述壳体内，所述继电器开关电路和所述温度反馈电路分别设置在所述电路板上。
本实用新型提供了一种继电器装置的驱动电路，通过设置温度反馈电路来为继电器开关电路提供不同温度条件下的闭环反馈，在继电器装置驱动期间，采用温度采集模块检测继电器线圈的温度，从而通过控制电路模块输出对应的占空比的脉冲调制信号，进而保证继电器线圈即不会烧毁，也不会由于驱动电流过小而导致继电器装置的触点无法维持闭合。
附图说明
图1为实施例的继电器装置的驱动电路的原理框图；
图2为实施例的继电器装置的驱动电路的电路示意图；
图3为实施例的接触器的结构示意图。
具体实施方式
下面结合附图对本实用新型进行详细的描述：
本实用新型的继电器装置可以是继电器(relay)、接触器(contactor)、或其它类似电器元件。为方便理解和描述，以下的实施例以继电器或接触器为例进行描述。但本领域的技术人员应理解，本实用新型并不局限于继电器或接触器。
本实用新型的MOS管可以是三极管或其他类似电器元件。为方便理解和描述，以下的实施例以MOS管为例进行描述。但本领域的技术人员应理解，本实用新型并不局限于MOS管。
如图1和2所示，本实施例提供的继电器装置的驱动电路主要分成两部分电路，包括左侧的继电器开关电路10和右侧的温度反馈电路20，所述继电器开关电路包括依次连接的电源、继电器线圈和MOS管的源/漏极所形成的继电器驱动回路，MOS管作为继电器线圈上电与否的开关器件，MOS管的栅极接入开关信号，MOS管的源/漏极一端连接继电器线圈，另一端可接地，为改善继电器线圈的驱动电路而在继电器线圈设置关于温度的闭环反馈电路，所述温度反馈电路包括温度采集模块和控制电路模块，所述温度采集模块采集所述继 电器线圈上的温度信息并传输到所述控制电路模块，所述控制电路模块根据所述温度信息进行脉宽调制，并将调节后的脉宽调制信号输出到所述MOS管的栅极，即控制电路模块输出脉宽调制(PWM)信号到所述MOS管的栅极。
驱动电压采用PWM(脉宽调制)的方式驱动继电器/接触器的线圈，可初始状态下使用较大占空比或恒定直流进行电压驱动，一旦接触器触点闭合，则可使用较小占空比的PWM维持接触器的闭合状态。继电器(relay)/接触器(contactor)的线圈通常由铜线缠绕，其电阻每摄氏度会增加0.4％。当温度升高时，使用相同的驱动电压将导致电流通过继电器线圈减少，如果占空比的选取过小，将造成继电器或接触器无法维持住其触点的闭合。因此，为了避免线圈无法闭合，驱动的占空比将尽量选大。但过大的占空比又会导致在低温下线圈大量发热，热量将会加速接触器的老化，缩短产品的使用寿命，甚至可能会烧毁线圈。
本实用新型采用温度采集模块来检测继电器线圈上的温度，所述温度采集模块包括温度传感器，所述温度传感器设置在继电器线圈上。所述温度采集模块还包括模数转换电路，所述温度传感器采集的所述温度信号为模拟信号，温度所代表的信号一般是连继的模拟信号，通常需要转换成方便信号处理的数字信号，经过所述模数转换电路的转换后连接到所述控制电路模块，检测到的温度信号经过模数转换电路处理后，转化为电压信号传送至控制电路模块，控制电路模块可以采用微处理器/单片机(MCU)，即控制电路模块通过调用MCU的内部电路实现，单片机可调用温度信息的电压信号进行PWM占空比调节运算。
在温度采集模块的安装设置上，所述温度传感器贴附设置在继电器线圈上或所述温度传感器安装设置在继电器的外壳内，也就是温度传感器元件既可以直接布置在接触器线圈上，也可以不与线圈直接接触，通过检测继电器/接触器腔体温度间接得到继电器线圈的温度。
所述温度传感器为接触式热电阻传感器、接触式热电偶传感器或非接触式红外温度传感器，也就是温度检测方式既可以采用接触式如正温度系数传感器，负温度系数传感器等，也可以采用红外等非接触式温度传感器检测。
在本实施例中，所述控制电路模块输出电压信号，所述控制电路模块根据所述温度信息调节所述脉宽调制信号的占空比。在驱动电路稳定工作过程中，所述脉宽调制信号的占空比的范围为20％－30％。由于铜的电阻变化率为0.4％/℃，例如将占空比设置为25％，如当85℃时，假设此时铜电阻为R，驱动电流为(25％电池电压/R)。根据铜电阻变化率，-40℃时，铜的电阻应为0.5R，如保持驱动电流不变(I＝U/R)，则占空比与温度关系可为：
输出占空比＝0.001T+0.165
其中，T为线圈温度。
一般性公式:
输出占空比＝0.004D*T+D*(1–0.004*T1)
其中，T为线圈温度，T1为线圈可以受的高温限值(如85℃)，D为T1时对应的占空比。
在继电器的驱动期间，温度采集模块将检测继电器线圈的温度，可根据上述公式得出对应的驱动占空比，进而保证继电器/接触器线圈既不会烧毁，也不会由于驱动电流过小导致触点无法维持闭合。当所述继电器线圈处于高温时，所述调节后的脉宽调制信号将 所述继电器装置的触点维持在闭合位置，当所述继电器线圈处于低温时，所述调节后的脉宽调制信号防止所述继电器线圈烧毁。所述温度采集模块的采集温度范围为-40℃到85℃；所述继电器线圈的工作温度范围为-40℃到85℃。
在本实施例中，所述MOS管的两个源/漏极之间设置反偏二极管，可设置成稳压二极管，利用pn结反向击穿状态，电流在很大范围内变化但是电压却基本维持不变，可以起到保护MOS管的作用。
为本实施例的继电器装置的驱动电路的电路示意图，为了更好的读取较低电平的温度信号，所述温度采集模块与所述控制电路模块之间设置一上拉电阻R2，从而可将一个不确定的信号通过电阻连接到高电平，使该信号初始为高电平。
进一步的，本实用新型还提供一种继电器，所述继电器装置采用了上述继电器装置的驱动电路，即达到降低继电器的功耗的目的，使继电器装置在高温环境工作时，同时保证了继电器装置的温升控制在安全的范围内，从而可以延长继电器的使用寿命。
可选的，所述继电器装置为接触器。进一步的，参考图3所示，所述接触器包括壳体和电路板，所述继电器装置的驱动电路设置在所述壳休内，所述继电器开关电路和所述温度反馈电路分别设置在所述电路板上。
本实用新型提供了一种继电器装置的驱动电路，通过设置温度反馈电路来为继电器开关电路提供不同温度条件下的闭环反馈，在继电器驱动期间，采用温度采集模块检测继电器线圈的温度，从而通过控制电路模块输出对应的占空比的脉冲调制信号，进而保证继电器线圈即不会烧毁，也不会由于驱动电流过小而导致继电器装置的触点无法维持闭合。
本实用新型中的实施例仅用于对本实用新型进行说明，并不构成对权利要求范围的限制，本领域内技术人员可以想到的其他实质上等同的替代，均在本实用新型保护范围内。

Claims (16)

  1. 一种继电器装置的驱动电路，其特征在于，包括：
    继电器开关电路，所述继电器开关电路包括依次连接的电源、继电器线圈和MOS管的源/漏极所形成的继电器驱动回路；及
    温度反馈电路，所述温度反馈电路包括温度采集模块和控制电路模块，所述温度采集模块采集所述继电器线圈的温度信息并传输到所述控制电路模块；
    所述控制电路模块根据所述温度信息进行脉宽调制，并将调节后的脉宽调制信号输出到所述MOS管的栅极。
  2. 根据权利要求1所述的继电器装置的驱动电路，其特征在于，所述温度采集模块包括温度传感器，所述温度传感器设置在所述继电器线圈上。
  3. 根据权利要求2所述的继电器装置的驱动电路，其特征在于，所述温度采集模块还包括模数转换电路，所述温度传感器采集的所述温度信息为模拟信号，经过所述模数转换电路的转换后连接到所述控制电路模块。
  4. 根据权利要求2所述的继电器装置的驱动电路，其特征在于，所述温度传感器贴附设置在所述继电器线圈上或所述温度传感器安装设置在继电器的外壳内。
  5. 根据权利要求2所述的继电器装置的驱动电路，其特征在于，所述温度传感器为接触式热电阻传感器、接触式热电偶传感器或非接触式红外温度传感器。
  6. 根据权利要求1所述的继电器装置的驱动电路，其特征在于，所述控制电路模块输出电压信号。
  7. 根据权利要求1所述的继电器装置的驱动电路，其特征在于，所述MOS管的两个源/漏极之间设置反偏二极管。
  8. 根据权利要求1所述的继电器装置的驱动电路，其特征在于，所述温度采集模块与所述控制电路模块之间设置一上拉电阻。
  9. 根据权利要求1至8中任一项所述的继电器装置的驱动电路，其特征在于，所述控制电路模块根据所述温度信息调节所述脉宽调制信号的占空比。
  10. 根据权利要求9所述的继电器装置的驱动电路，其特征在于；
    当所述继电器线圈处于高温时，所述调节后的脉宽调制信号将所述继电器装置的触点维持在闭合位置；
    当所述继电器线圈处于低温时，所述调节后的脉宽调制信号防止所述继电器线圈烧毁。
  11. 根据权利要求10所述的继电器装置的驱动电路，其特征在于，所述调节后的脉宽调制信号的占空比的范围为20％－30％。
  12. 根据权利要求10所述的继电器装置的驱动电路，其特征在于，所述温度采集模块的采集温度范围为-40℃到85℃。
  13. 根据权利要求10所述的继电器装置的驱动电路，其特征在于，所述继电器线圈的工作温度范围为-40℃到85℃。
  14. 一种继电器装置，其特征在于，所述继电器装置采用如权利要求1－13中任一项所述的继电器装置的驱动电路。
  15. 根据权利要求14所述的继电器装置，其特征在于，所述继电器装置为接触器。
  16. 根据权利要求15所述的继电器装置，其特征在于，所述接触器包括：壳体，所述继电 器装置的驱动电路设置在所述壳体内；及
    电路板，所述继电器开关电路和所述温度反馈电路分别设置在所述电路板上。
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