WO2001022461A1 - A pulse driving source circuit - Google Patents

A pulse driving source circuit Download PDF

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Publication number
WO2001022461A1
WO2001022461A1 PCT/CN2000/000277 CN0000277W WO0122461A1 WO 2001022461 A1 WO2001022461 A1 WO 2001022461A1 CN 0000277 W CN0000277 W CN 0000277W WO 0122461 A1 WO0122461 A1 WO 0122461A1
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Prior art keywords
control unit
thermal element
source circuit
voltage
drive source
Prior art date
Application number
PCT/CN2000/000277
Other languages
French (fr)
Chinese (zh)
Inventor
Rongqi Li
Shaohua Wang
Original Assignee
Beijing Hi-Tone Technology Co., Ltd.
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 Beijing Hi-Tone Technology Co., Ltd. filed Critical Beijing Hi-Tone Technology Co., Ltd.
Priority to AU72669/00A priority Critical patent/AU7266900A/en
Publication of WO2001022461A1 publication Critical patent/WO2001022461A1/en

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Classifications

    • 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

Definitions

  • the present invention relates to a pulse drive source circuit, and more particularly to a circuit for driving a magnetic holding relay.
  • Many actuators such as magnetic latching relays, need to be driven by low-voltage pulsed current sources.
  • a known method is to use a transformer to reduce the voltage to produce a low-voltage and high-power power supply, which is then powered by a drive circuit and generates a high-current pulse drive source through a drive circuit to drive the actuator. This method requires a low-voltage, high-current power supply. It not only increases the cost, but also increases the power consumption and volume.
  • the object of the present invention is to invent a pulse drive source circuit that consumes little or no electrical energy when the actuator is not driven, does not require a low-voltage power source when driving, and can directly obtain driving energy from a higher-voltage power source.
  • Simple and reliable pulse drive source circuit The present invention is implemented as follows: a positive temperature coefficient thermal element Rt (hereinafter referred to as a "thermal element" Rt) that is connected in series with the driven actuator A and meets the voltage requirements and can provide sufficient driving power at room temperature Control unit S.
  • Thermal element" Rt, the driven actuator A and the control unit S are connected in series directly to the power input terminals a and b.
  • the position of the "thermal element” Rt, the driven actuator A, and the control unit S in series can be arbitrary.
  • the control circuit S is just turned on, the "thermosensitive element” Rt is at room temperature, and its own resistance is a small resistance value at room temperature. Through the resistance drop at room temperature, sufficient low-voltage drive current is provided to the driven actuator. Thereafter, as the driving current flows through the "thermosensitive element” Rt, the “thermosensitive element” Rt is heated, the temperature rises, the self resistance increases, and the driving current will decrease.
  • the "thermal element” Rt parameter By selecting the “thermal element” Rt parameter, it is ensured that the voltage drop through the “thermal element” Rt under normal temperature resistance can provide sufficient driving current.
  • the control unit S After the control unit S is turned on, the "thermal element” can be passed.
  • the resistance of the component "RT” at normal temperature, and the pulse drive current generated after the resistance is stepped down in a time increment, effectively and reliably complete the driving task.
  • This model of driving current initially provided, followed by a reduced driving current model meets the driving requirements of general actuators. The reason is that from the initial speed From zero to speed, the acceleration at the beginning is the largest, so the required force is the largest.
  • the actuator with electromagnetic action as the main body has the largest action distance of the electromagnet at the beginning of the action and the largest driving power.
  • the control unit S After the circuit finishes driving, the control unit S is turned off, and the "thermal element" Rt returns to the normal temperature state, preparing for the next driving. If the control unit S- is directly connected due to the failure of the drive circuit, then the temperature increases due to the current flowing through the "thermal element” Rt, the resistance increases, and the current decreases until it finally reaches the temperature, resistance and current balance. At this time, the actual The current flowing will be small, as long as the control unit S resumes normal shutdown, the circuit can still work safely and reliably. When the temperature of the "Thermal Element" Rt rises and the resistance increases, the voltage drop across the "Thermal Element” Rt will increase.
  • a pulse drive source circuit especially a circuit for driving a magnetic holding relay, has a thermal element Rt and a control unit S, which are characterized by-a.
  • the thermal element Rt is connected in series with the control unit S and the driven actuator A After that, directly add to the power supply,
  • the thermal element Rt is a positive temperature coefficient thermal element that meets the requirements of withstand voltage and can provide sufficient driving current at room temperature.
  • the thermal element Rt since the "thermal element" Rt, the driven actuator A, and the control unit S are connected in series, when the control unit S starts, no current flows through the entire circuit, so it consumes little or little Power consumption.
  • the entire circuit When driving, the entire circuit is directly connected to a higher voltage power source to obtain a driving source through the "thermosensitive element" Rt voltage step-down. No additional device is required, so the entire circuit is simple and the cost is low.
  • thermo element Rt is a positive temperature coefficient thermistor, even if the control unit S fails, it can automatically warm itself by outputting sufficient drive current through the current and greatly increase its resistance during the heating process, making the circuit in a small In the current protection state, and after the control unit S is turned off, it returns to normal, so the pulse drive source is safe and reliable, thereby achieving and completing the object of the present invention.
  • the circuit of the present invention is simple, safe and reliable, it can be widely used in fields that require a pulse source to drive less frequently, which require high power consumption, volume and cost. Combined use, especially when the magnetic holding relay needs to be installed in the watt-hour meter
  • Figure 1 is a schematic circuit diagram of the present invention.
  • Fig. 2 is an embodiment of the present invention.
  • Fig. 3 is a third embodiment of the present invention.
  • Fig. 4 is an embodiment of the present invention. The invention is further described below with reference to the drawings.
  • Rt is a positive temperature coefficient thermal element that can provide sufficient driving current at room temperature that meets the requirements of withstand voltage requirements.
  • A is the driven actuator
  • S is the control unit
  • a, b are higher voltage power input terminals, and can be DC. You can also communicate.
  • the control unit S is turned on, the driven actuator A provides a driving current source through the temperature drop of the "thermal element" Rt at room temperature. Thereafter, the "thermal element” Rt will heat up and increase its own resistance value, thereby continuously reducing the driving current. After the control unit S is turned off, the "thermal element” Rt will return to the resistance value at normal temperature and prepare for the next drive.
  • FIG. 2 is an embodiment in which the power supply terminals a and b of the two circuits are directly connected to the AC power source.
  • the control unit S has a control unit S E only in the forward direction and a control only in the reverse direction.
  • Unit S £ control when the control unit S E is turned on, a forward pulse drive source is provided, and when the control unit S is turned on, a reverse pulse drive source is provided.
  • FIG. 3 is another embodiment.
  • the control unit S ⁇ is composed of a unidirectional thyristor (unidirectional thyristor) which is turned on only in the positive half cycle, and the control unit S s is composed of a bidirectional thyristor (triac).
  • FIG. 4 is a third embodiment.
  • the driven actuator A has a voltage stabilizing component Pv and a filtering element C connected in parallel at both ends.

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Abstract

A pulse driving source circuit includes a positive temperature coefficient self-heating resistor which is connected to the driven circuit in series. By connecting a unidirectional element to the driven circuit, a positive or negative driving source can be obtained. The special circuit that reduces voltage is not required. The invention can be used in relays in particular.

Description

一种脉冲驱动源电路 本发明涉及一种脉冲驱动源电路， 特别是驱动磁保持继电器的电 路。 有许多执行机构， 比如磁保持继电器， 需要用低电压的脉冲电流 源驱动。 公知的方法， 是利用变压器降压， 制造出低电压大功率的电 源， 再由该电源供电， 通过驱动电路产生大电流脉冲驱动源去驱动执 行机构。 这种方法需要有一个低压大电流的电源。 它不仅加大了成 本 ， 还增加了功耗和体积， 在许多对功耗、 体积、 成本要求高的场 合， 比如电度表中加装断电执行机构——磁保持继电器就很难使用。 本发明的目的是发明一种脉冲驱动源电路， 它在不驱动执行机构 时， 不消耗或极少消耗电能量， 在驱动时不需要低电压电源， 能直接 从较高电压电源获得驱动能量的简单安全可靠的脉冲驱动源电路。 本发明是这样实现的： 与被驱动的执行机构 A串联连接的有符合 耐压要求的、常温下能提供足够驱动电源的正温度系数热敏元件 Rt (以 下简称 "热敏元件" Rt)和控制单元 S。 "热敏元件" Rt， 被驱动的执 行机构 A和控制单元 S串联后直接接在电源入端 a、 b端上。 "热敏元 件 " Rt， 被驱动的执行机构 A， 控制单元 S串联的位置可以是任意的。 当控制电路 S 刚接通时， "热敏元件" Rt处于常温下， 自身电阻 为常温较小的电阻值， 通过常温电阻降压， 向被驱动的执行机构提供 了足够的低压驱动电流。 其后， 随着驱动电流流过 "热敏元件" Rt， "热敏元件" Rt被加热， 升温， 自身电阻增加 ， 驱动电流将减小。 通过对 "热敏元件" Rt参数的选择 ， 确保在常温电阻下直接通 过 "热敏元件" Rt降压， 能提供足够的驱动电流， 那么在控制单元 S 接通后， 就能通过 "热敏元件" Rt常温下电阻， 和其后在一个时间增 量中的电阻降压后产生的脉冲驱动电流， 有效地、 可靠地完成驱动任 务。 这种开始提供的驱动电流， 其后减小的驱动电流模型， 符合一般 执行机构的驱动要求。 原因在于， 一般执行机构动作时， 从初始速度 零到有速度， 开始的加速度最大 ， 因而需要的作用力最大 ； 从另一 方面看， 以电磁动作为主体的执行机构， 开始动作时的电磁体的作用 距离最大， 需要的驱动功率也最大。 电路在完成驱动后， 控制单元 S 断开， "热敏元件" Rt恢复常温 状态， 为下一次驱动作准备。 如果由于驱动电路故障， 控制单元 S—直接通， 那么， 由于流过 "热敏元件" Rt的电流使其温度上升， 电阻增加， 电流减少以至最后 达到温度、 电阻和电流的平衡， 这时实际流过的电流将很小， 只要控 制单元 S恢复正常关断， 电路仍可以安全可靠地工作。 当 "热敏元件" Rt温度上升， 电阻增加后， "热敏元件" Rt上的 压降将增加， 因此 "热敏元件" Rt应选择两端能承受足够电压的规格。 一种脉冲驱动源电路， 特别是驱动磁保持继电器的电路， 有热敏 元件 Rt， 有控制单元 S， 其特征在于- a. 热敏元件 Rt是与控制单元 S， 被驱动执行机构 A串联连接 后， 直接加到电源上的， BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse drive source circuit, and more particularly to a circuit for driving a magnetic holding relay. Many actuators, such as magnetic latching relays, need to be driven by low-voltage pulsed current sources. A known method is to use a transformer to reduce the voltage to produce a low-voltage and high-power power supply, which is then powered by a drive circuit and generates a high-current pulse drive source through a drive circuit to drive the actuator. This method requires a low-voltage, high-current power supply. It not only increases the cost, but also increases the power consumption and volume. In many places with high requirements on power consumption, volume and cost, such as installing a power-off actuator in a watt-hour meter, a magnetic holding relay is difficult to use. The object of the present invention is to invent a pulse drive source circuit that consumes little or no electrical energy when the actuator is not driven, does not require a low-voltage power source when driving, and can directly obtain driving energy from a higher-voltage power source. Simple and reliable pulse drive source circuit. The present invention is implemented as follows: a positive temperature coefficient thermal element Rt (hereinafter referred to as a "thermal element" Rt) that is connected in series with the driven actuator A and meets the voltage requirements and can provide sufficient driving power at room temperature Control unit S. "Thermal element" Rt, the driven actuator A and the control unit S are connected in series directly to the power input terminals a and b. The position of the "thermal element" Rt, the driven actuator A, and the control unit S in series can be arbitrary. When the control circuit S is just turned on, the "thermosensitive element" Rt is at room temperature, and its own resistance is a small resistance value at room temperature. Through the resistance drop at room temperature, sufficient low-voltage drive current is provided to the driven actuator. Thereafter, as the driving current flows through the "thermosensitive element" Rt, the "thermosensitive element" Rt is heated, the temperature rises, the self resistance increases, and the driving current will decrease. By selecting the "thermal element" Rt parameter, it is ensured that the voltage drop through the "thermal element" Rt under normal temperature resistance can provide sufficient driving current. After the control unit S is turned on, the "thermal element" can be passed. The resistance of the component "RT" at normal temperature, and the pulse drive current generated after the resistance is stepped down in a time increment, effectively and reliably complete the driving task. This model of driving current initially provided, followed by a reduced driving current model, meets the driving requirements of general actuators. The reason is that from the initial speed From zero to speed, the acceleration at the beginning is the largest, so the required force is the largest. On the other hand, the actuator with electromagnetic action as the main body has the largest action distance of the electromagnet at the beginning of the action and the largest driving power. After the circuit finishes driving, the control unit S is turned off, and the "thermal element" Rt returns to the normal temperature state, preparing for the next driving. If the control unit S- is directly connected due to the failure of the drive circuit, then the temperature increases due to the current flowing through the "thermal element" Rt, the resistance increases, and the current decreases until it finally reaches the temperature, resistance and current balance. At this time, the actual The current flowing will be small, as long as the control unit S resumes normal shutdown, the circuit can still work safely and reliably. When the temperature of the "Thermal Element" Rt rises and the resistance increases, the voltage drop across the "Thermal Element" Rt will increase. Therefore, the "Thermal Element" Rt should choose a specification that can withstand sufficient voltage at both ends. A pulse drive source circuit, especially a circuit for driving a magnetic holding relay, has a thermal element Rt and a control unit S, which are characterized by-a. The thermal element Rt is connected in series with the control unit S and the driven actuator A After that, directly add to the power supply,
b. 热敏元件 Rt是耐压符合要求， 常温下能提供足够驱动电流 的正温度系数热敏元件。 本发明的电路， 由于 "热敏元件" Rt、 被驱动的执行机构 A、 控制单元 S是串联连连接的， 因此当控制单元 S开始时， 没有电流 流过整个电路， 因而不消耗或极少消耗功率。 在驱动时， 由于整个电 路直接接在较高电压的电源上通过 "热敏元件" Rt降压获得驱动源， 不需要附加装置， 因此整个电路简单， 成本低。 由于 "热敏元件" Rt 是正温度系数热敏电阻， 即使控制单元 S发生故障， 也能够自动在输 出足够驱动电流后通过电流加温自身并在升温过程中自身电阻大大增 加， 而使电路处于小电流的保护状态下， 且在控制单元 S关断后， 恢 复正常， 因此该脉冲驱动源是安全可靠的， 从而达到和完成了本发明 的目的 。 由于本发明的电路简单 、 安全可靠 ， 可以广泛用于操作 不十分频繁的需要用脉冲源驱动的对功耗、 体积、 成本要求较高的场 合使用， 特别是电度表中需要加装磁保持继电器的场合使用 图 1是本发明的电路原理图。 b. The thermal element Rt is a positive temperature coefficient thermal element that meets the requirements of withstand voltage and can provide sufficient driving current at room temperature. In the circuit of the present invention, since the "thermal element" Rt, the driven actuator A, and the control unit S are connected in series, when the control unit S starts, no current flows through the entire circuit, so it consumes little or little Power consumption. When driving, the entire circuit is directly connected to a higher voltage power source to obtain a driving source through the "thermosensitive element" Rt voltage step-down. No additional device is required, so the entire circuit is simple and the cost is low. Since the "thermal element" Rt is a positive temperature coefficient thermistor, even if the control unit S fails, it can automatically warm itself by outputting sufficient drive current through the current and greatly increase its resistance during the heating process, making the circuit in a small In the current protection state, and after the control unit S is turned off, it returns to normal, so the pulse drive source is safe and reliable, thereby achieving and completing the object of the present invention. Because the circuit of the present invention is simple, safe and reliable, it can be widely used in fields that require a pulse source to drive less frequently, which require high power consumption, volume and cost. Combined use, especially when the magnetic holding relay needs to be installed in the watt-hour meter Figure 1 is a schematic circuit diagram of the present invention.
图 2是本发明的一个实施例。  Fig. 2 is an embodiment of the present invention.
图 3是本发明的第三个实施例。  Fig. 3 is a third embodiment of the present invention.
图 4是本发明的一个实施例。 下面结合附图对本发明作进一步的说明。 Rt 是符合耐压要求的常 温下能够提供足够驱动电流的正温度系数热敏元件， A 是被驱动的执 行机构， S是控制单元， a、 b是较高电压的电源输入端， 可以是直流 的也可以是交流的。 当控制单元 S接通时， 被驱动的执行机构 A通过 "热敏元件" Rt的常温电阻降压提供驱动电流源。 其后 "热敏元件" Rt将升温并增加自身的电阻值， 从而不断减小驱动电流。 控制单元 S 关断后， "热敏元件" Rt将回到常温的电阻值， 为下一次驱动做准备。 有些场合， 驱动电流需要正向和反向的。 图 2是一个实施例， 两 个电路供电电源端 a、 b是直接接在交流电源上的， 控制单元 S 分别 有只在正向导通的控制单元 S E时， 和只在反向导通的控制单元 S £控 制， 当接通控制单元 S E时， 提供正向脉冲驱动源， 当接通控制单元 S 时， 提供反向脉冲驱动源。 图 3 是另一个实施例， 控制单元 S ^是由一个只在正半周导通的 单向晶闸管 （单向可控硅） 构成的， 控制单元 S s是由一个双向晶闸 管 （双向可控硅） 串联有一个反向二极管构成的。 当单向晶闸管导通 时， 输出正向驱动电流， 当双向晶闸管导通时， 输出反向驱动电流。 图 4是第三个实施例， 为了保证脉冲驱动源电路的安全性， 被驱 动的执行机构 A两端并联有稳压部件 Pv和滤波元件 C。 Fig. 4 is an embodiment of the present invention. The invention is further described below with reference to the drawings. Rt is a positive temperature coefficient thermal element that can provide sufficient driving current at room temperature that meets the requirements of withstand voltage requirements. A is the driven actuator, S is the control unit, a, b are higher voltage power input terminals, and can be DC. You can also communicate. When the control unit S is turned on, the driven actuator A provides a driving current source through the temperature drop of the "thermal element" Rt at room temperature. Thereafter, the "thermal element" Rt will heat up and increase its own resistance value, thereby continuously reducing the driving current. After the control unit S is turned off, the "thermal element" Rt will return to the resistance value at normal temperature and prepare for the next drive. In some cases, the drive current needs to be forward and reverse. FIG. 2 is an embodiment in which the power supply terminals a and b of the two circuits are directly connected to the AC power source. The control unit S has a control unit S E only in the forward direction and a control only in the reverse direction. Unit S £ control, when the control unit S E is turned on, a forward pulse drive source is provided, and when the control unit S is turned on, a reverse pulse drive source is provided. FIG. 3 is another embodiment. The control unit S ^ is composed of a unidirectional thyristor (unidirectional thyristor) which is turned on only in the positive half cycle, and the control unit S s is composed of a bidirectional thyristor (triac). It consists of a reverse diode in series. When the unidirectional thyristor is on, it outputs a forward drive current, and when the bidirectional thyristor is on, it outputs a reverse drive current. FIG. 4 is a third embodiment. In order to ensure the safety of the pulse driving source circuit, the driven actuator A has a voltage stabilizing component Pv and a filtering element C connected in parallel at both ends.

Claims

权利要求 Rights request
1 . 一种脉冲驱动源电路， 特别是驱动磁保持继电器的电路， 包括热敏元件 Rt, 控制单元 S， 其特征在于： A pulse drive source circuit, particularly a circuit for driving a magnetic holding relay, comprising a thermal element Rt and a control unit S, characterized in that:
a. 所述热敏元件 Rt是与控制单元 S， 被驱动执行机构 A串联连 接后， 直接加到电源上的，  a. The thermal element Rt is directly connected to the power supply after being connected in series with the control unit S and the driven actuator A.
b.所述热敏元件 Rt是耐压符合要求， 常温下能提供足够驱动电 流的正温度系数热敏元件。  b. The thermal element Rt is a positive temperature coefficient thermal element that meets the requirements of withstand voltage and can provide sufficient driving current at room temperature.
2. 根据权利要求 1 所述的脉冲驱动源电路， 其特征在于， 所述 控制单元 S产生的正向和反向驱动源是通过分别控制只在正向电压时 导通的控制单元 S ^和只是在反向电压时导通的控制单元 S ^实现的。 2. The pulse drive source circuit according to claim 1, wherein the forward and reverse drive sources generated by the control unit S are controlled by controlling the control units S ^ and ON which are turned on only in the forward voltage, respectively Only the control unit S ^ which is turned on at the reverse voltage is realized.
3. 根据权利要求 1 所述的脉冲驱动源电路， 其特征在于， 在所 述被驱动执行机构 A两端并联有稳压部件 Pv和滤波元件 C。 3. The pulse drive source circuit according to claim 1, wherein a voltage stabilizing component Pv and a filter element C are connected in parallel at both ends of the driven actuator A.
4. 根据权利要求 2 所述的脉冲驱动源电路， 其特征在于， 所述 控制单元 S 的正向控制单元 S E是用只在交流电正半周导通的单 向晶闸管 （单向可控硅） 实现的， 所述反向导通的控制单元 S 反 是由双向晶闸管 （双向可控硅） 串联一个反向连接的二极管只在 交流电负半周导通实现的。 4. The pulse drive source circuit according to claim 2, wherein the forward control unit S E of the control unit S is a unidirectional thyristor (unidirectional thyristor) that is turned on only during the positive half cycle of the alternating current. It is realized that the reverse conducting control unit S is realized by a triac (triac) connected in series with a reverse-connected diode only in the negative half cycle of the alternating current.
PCT/CN2000/000277 1999-09-20 2000-09-15 A pulse driving source circuit WO2001022461A1 (en)

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Application Number Priority Date Filing Date Title
AU72669/00A AU7266900A (en) 1999-09-20 2000-09-15 A pulse driving source circuit

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CN 99119188 CN1129929C (en) 1999-09-20 1999-09-20 Pulse driving source circuit
CN99119188.9 1999-09-20

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CN1289138A (en) 2001-03-28
AU7266900A (en) 2001-04-24

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