WO2019223042A1 - 一种单相双压电动机用的热保护装置 - Google Patents

一种单相双压电动机用的热保护装置 Download PDF

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Publication number
WO2019223042A1
WO2019223042A1 PCT/CN2018/091313 CN2018091313W WO2019223042A1 WO 2019223042 A1 WO2019223042 A1 WO 2019223042A1 CN 2018091313 W CN2018091313 W CN 2018091313W WO 2019223042 A1 WO2019223042 A1 WO 2019223042A1
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Prior art keywords
phase winding
main phase
voltage
motor
current
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PCT/CN2018/091313
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English (en)
French (fr)
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王晛
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苏州优德通力科技有限公司
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Priority to US16/436,888 priority Critical patent/US20190363534A1/en
Publication of WO2019223042A1 publication Critical patent/WO2019223042A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby

Definitions

  • the invention relates to the technical field of application of a protector, in particular to a thermal protection device for a single-phase dual-voltage motor.
  • the technical problem mainly solved by the present invention is to provide a thermal protection device for a single-phase dual-voltage motor, which is realized by one thermal protector with high and low voltage protection at the same time, and is implemented by two thermal protectors with different sizes.
  • Reasonable wiring of the circuit to achieve the thermal protection function of the single-phase dual-voltage motor under different voltages. Use a thermal protector that can be tied to the stator wire package to save motor space. There is no need to design additional placement devices on the parts.
  • the motor volume can be Do smaller, greatly reduce costs, shorten delivery time, and improve product competitiveness.
  • a technical solution adopted by the present invention is to provide a thermal protection device for a single-phase dual-voltage motor, including a motor winding, a small current thermal protector, a high current thermal protector, and a bidirectional switch.
  • the motor winding includes a main phase winding, or a main phase winding and a secondary phase winding.
  • the main phase winding is divided into two parts, including a first main phase winding and a second main phase winding.
  • the small current thermal protector The first main phase winding is connected in series, the high current thermal protector is connected in series with the second main phase winding, or the second main phase winding and the secondary phase winding are connected in series, the small current thermal protector and high current thermal protection are connected in series.
  • One end of the device is also connected to the power input end, and the two-way switch is respectively connected to the small current thermal protector, the high current thermal protector, the output end of the first main phase winding and the other end of the second main phase winding.
  • the first main phase winding and the second main phase winding are connected in the following manner: the first main phase winding and the second main phase winding are connected in series under high voltage and under voltage through a bidirectional switch. in parallel.
  • the low-current thermal protector is a thermal protector carrying a current of 0-40A
  • the high-current thermal protector is a protector carrying a current of 0-80A.
  • a small current thermal protector works; when the power input terminal is connected to a low voltage operation, the high current protector functions. .
  • the two-way switch is one of a slide switch or a push button boat switch, which uses six contacts, including 1, 2, 3, 4, 5, and 6 contacts.
  • the 5-contact and 6-contact are short-circuited.
  • the high voltage is twice the relationship of the low voltage.
  • the single-phase dual-voltage motor uses one of a capacitor-operated motor, a capacitor-start motor, a resistance-start motor, a capacitor-operated capacitor-start motor, a series-excited motor, and a shaded-pole motor.
  • the beneficial effect of the present invention is that the thermal protection device for the single-phase dual-voltage motor of the present invention is changed from one thermal protector with high and low voltage protection at the same time, to two thermal protectors with different sizes, which are respectively realized through a circuit Reasonable wiring to achieve the thermal protection function of single-phase dual-voltage motors under different voltages.
  • the motor volume can be made. Smaller, significantly reduce costs, shorten delivery time, and improve product competitiveness.
  • FIG. 1 is a circuit diagram of a preferred embodiment of a thermal protection device for a single-phase dual-voltage motor according to the present invention, which is suitable for connecting a thermal protection device to a shaded-pole motor and a series-excited motor;
  • FIG. 2 is a circuit diagram of a low-voltage connection method of a secondary-phase winding connected to a thermal protection device of a capacitor-operated motor;
  • FIG. 3 is a circuit diagram of a high-voltage connection method of a secondary-phase winding connected to a thermal protection device of a capacitor-operated motor;
  • FIG. 4 is a circuit diagram of a low-voltage connection method of a secondary-phase winding connected to a thermal protection device of a capacitor starter motor;
  • FIG. 5 is a circuit diagram of a high-voltage connection method of a secondary phase winding connected to a thermal protection device of a capacitor starter motor;
  • FIG. 6 is a circuit diagram of a low-voltage connection method of a secondary-phase winding connected to a thermal protection device of a resistance starter motor;
  • FIG. 7 is a circuit diagram of a high-voltage connection method of a secondary phase winding connected to a thermal protection device with a resistance starter motor;
  • FIG. 8 is a circuit diagram of a low-voltage connection method of a secondary-phase winding connected to a thermal protection device of a capacitor-operated capacitor-starting motor;
  • FIG. 9 is a circuit diagram of a high-voltage connection method of a secondary-phase winding connected to a thermal protection device with a capacitor-operated capacitor-starting motor;
  • the marks in the drawings are: 1, the first main phase winding, 2, the second main phase winding, 3, a small current thermal protector, 4, a high current thermal protector, 5, a bidirectional switch, 6, and a secondary phase winding, 7, running capacitor, 8, centrifuge 9, starting capacitor.
  • an embodiment of the present invention includes:
  • a thermal protection device for a single-phase dual-voltage motor includes a motor winding, a small current thermal protector 3, a high current thermal protector 4, and a bidirectional switch 5.
  • the motor winding includes a main phase winding, or a main phase winding and A secondary phase winding.
  • the main phase winding is divided into two parts, including a first main phase winding 1 and a second main phase winding 2.
  • One end of the small current thermal protector 3 is connected in series with the first main phase winding 1.
  • One end U1 or the other end U2 one end of the small-current thermal protector 3 and one end of the high-current thermal protector 4 are respectively connected to a power input terminal, and one end of the high-current thermal protector 4 is connected in series at the first One end U4 of the two main phase windings 2, the two-way switch 5 is connected to the small current thermal protector 3, the high current thermal protector 4, the other end U2 of the first main phase winding 1, and the other of the second main phase winding 2.
  • U3 is connected at one end.
  • first main phase winding 1 and the second main phase winding 2 are connected in series or in parallel.
  • the low-current thermal protector 3 adopts a thermal protector carrying a current of 0-40A, such as 17AM or other similar thermal protectors, for thermal protection of a motor under high voltage; the high-current thermal protector The protector 4 uses a thermal protector carrying a current of 0-80A, such as 8AM or a similar thermal protector, for thermal protection of the motor at low voltage.
  • the two-way switch 5 may be one of a slide switch or a button boat switch, which uses six contacts, including 1, 2, 3, 4, 5, and 6 contacts. By moving the slider, it is used for high and low voltage line switching, wherein the 5 contacts and 6 contacts are short-circuited in advance.
  • the high voltage is twice the relationship of the low voltage, such as 230/115, 460 / 230V, and so on.
  • the thermal protection device for a single-phase dual-voltage motor further includes a secondary phase winding 6, one end A1 of the secondary phase winding 6 is connected to one end U2 or the other end U1 of the first main phase winding 1, The other end A2 of the secondary phase winding 6 and one end U4 of the second main phase winding 2 are directly connected or indirectly (or through a capacitor or through a centrifuge).
  • High voltage wiring, small current thermal protector 3 is connected in series in the first main phase winding 1, the first main phase winding 1 and the second main phase winding 2 are connected in series, and the second main phase winding 2 and the secondary phase The windings 6 are connected in parallel, and then a high-current thermal protector 4 is connected.
  • the low-current thermal protector 3 senses the temperature to reach the disconnection temperature and cuts off the circuit.
  • the first main phase winding 1, the second main phase winding 2 and the secondary phase winding 6 are all powered off to protect the motor winding Not burned.
  • small current thermal protector 3 is connected in series in the first main phase winding 1, the first main phase winding 1 and the second main phase winding 2 are connected in parallel with the three windings of the secondary phase winding 6, and then connected to the high current thermal protection ⁇ 4 ⁇ 4.
  • the high-current thermal protector 4 senses the temperature reaches the cut-off temperature and cuts off the circuit.
  • the first main phase winding 1, the second main phase winding 2 and the secondary phase winding 6 are powered off to protect the motor winding Not burned.
  • the single-phase dual-voltage motor 7 may be a capacitor-operated motor, a capacitor-starter motor, a resistance-starter motor, a capacitor-operated capacitor-starter motor, Either a series-excited motor or a shaded-pole motor.
  • the input terminal of the power supply is connected to a high voltage, and one end of the current passes through node a, passes through the small current thermal protector 3, enters the first main phase winding 1, and then flows into the bidirectional switch 5, and then passes through the 3564 contact and flows into node b.
  • Phase winding 6 and the second main phase winding 2 are connected in parallel. At this time, the current is divided into two parallels, one of which flows into the second main phase winding 2; the other flows into the secondary phase winding 6, which flows through the capacitor and the current passing through the second main phase winding 2.
  • the current flows into node c, flows through node d, enters the high-current thermal protector 4, and enters the other end of the power input terminal to complete the high-voltage circuit.
  • the low-phase connection of the secondary phase winding is used.
  • the small-current thermal protector 3 is connected in series with the high-current thermal protector 4 (the current flowing through the two protectors is the same). Because the current is small, the small-current thermal protection is the protection. Device 3, and the high-current thermal protector 4 will not operate.
  • the input terminal of the power supply is connected to a low voltage, and one end of the current passes through node a.
  • the current is divided into two paths, and one path passes through the small current thermal protector 3, enters the first main phase winding 1, and then flows into the bidirectional switch 5 through the contact 3. And 1 contact, flows into node d, enters the high-current thermal protector 4, enters the other end of the power input terminal, and completes a loop.
  • the other current flows into the bidirectional switch 5 through the 2 and 4 contacts in sequence and flows into node b.
  • the current is divided into two parallel and one flows into the second main phase winding 2; the other flows into the secondary phase winding 6 and flows through the capacitor and through the first
  • the current of the two main phase windings 2 flows into node c, flows through node d, enters the high-current thermal protector 4, enters the other end of the power input terminal, and completes another circuit.
  • the low-phase connection of the secondary phase winding is adopted.
  • the small current thermal protector 3 protects the first main phase winding 1
  • the high current thermal protector 4 protects the first main phase winding 1, the second main phase winding 2 and the secondary phase winding at the same time. 6.
  • the high-current thermal protector 4 operates due to a large current, and the low-current thermal protector 3 does not operate at this time.
  • the thermal protection device for a single-phase dual-voltage motor of the present invention is changed from one thermal protector with high and low voltage protection at the same time, to two thermal protectors with different sizes through reasonable wiring of the circuit. Realize the thermal protection function of single-phase dual-voltage motors under different voltages. Use a thermal protector that can be tied to the stator wire package to save motor space. No additional design device is needed on the parts. The motor volume can be made smaller and significantly larger. Reduce costs, shorten delivery time, and improve product competitiveness.

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  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)

Abstract

一种单相双压电动机用的热保护装置，包括电机绕组、小电流热保护器（3）、大电流热保护器（4）以及双向开关（5），所述的电机绕组包括主相绕组，或主相绕组和副相绕组（6），所述的主相绕组分为两部分，包括第一主相绕组（1）和第二主相绕组（2），所述的小电流热保护器（3）串联连接第一主相绕组（1），所述的大电流热保护器（4）串联连接第二主相绕组（2），或串联连接第二主相绕组（2）和副相绕组（6）。通过两个不同的大小热保护器，通过电路的合理接线，来实现单相双压电动机在不同电压下的热保护功能，使用能绑扎在定子线包上的保护器，大幅降低成本，缩短交货时间，提高了产品竞争力。

Description

一种单相双压电动机用的热保护装置 技术领域
本发明涉及保护器的应用技术领域，特别是涉及一种单相双压电动机用的热保护装置。
背景技术
单相双压电动机选用的热保护器，通常使用专门设计的双压热保护器，这种保护器的技术都掌握在少数企业手中，价格昂贵，且大部分是外置式的，需要外置安装在设计有安装位置的端盖或机壳上，电机体积做的比较大，安装较为复杂，使得电机成本提高，而且其交货时间长，不能适应市场的激烈竞争需要。
发明内容
本发明主要解决的技术问题是提供一种单相双压电动机用的热保护装置，由同时具备高低电压保护的一个热保护器，改为由两个不同的大小热保护器来分别实现，通过电路的合理接线，来实现单相双压电动机在不同电压下的热保护功能，使用能绑扎在定子线包上的热保护器，节省电机空间，不需零件上另外设计安放装置，电机体积可以做的较小，大幅降低成本，缩短交货时间，提高了产品竞争力。
为解决上述技术问题，本发明采用的一个技术方案是：提供了一种单相双压电动机用的热保护装置，包括电机绕组、小电流热保护器、大电流热保护器以及双向开关，所述的电机绕组包括主相绕组，或主相绕组和副相绕组，所述的主相绕组分为两部分，包括第一主相绕组和第二主相绕组，所述的小电流热保护器串联连接第一主相绕组，所述的大电流热保护器串联连接第二主相绕组， 或串联连接第二主相绕组和副相绕组，所述的小电流热保护器和大电流热保护器的一端还分别连接在电源输入端，所述的双向开关分别与小电流热保护器、大电流热保护器、第一主相绕组的输出端和第二主相绕组的另一端相连接。
在本发明一个较佳实施例中，所述的第一主相绕组和第二主相绕组连接方式为：通过双向开关完成第一主相绕组和第二主相绕组的高压下串联和低压下并联。
在本发明一个较佳实施例中，所述的小电流热保护器采用承载电流0-40A的热保护器，所述的大电流热保护器采用承载电流0-80A的保护器。
在本发明一个较佳实施例中，所述的电源输入端接入高电压工作时，小电流热保护器起作用；所述的电源输入端接入低电压工作时，大电流保护器起作用。
在本发明一个较佳实施例中，所述的双向开关是滑动开关或按钮船形开关中的一种，采用六触点，包括1、2、3、4、5、6触点。
在本发明一个较佳实施例中，所述的5触点和6触点短接。
在本发明一个较佳实施例中，所述的电源输入端接入低电压工作时，1触点和3触点连通，2触点和4触点连通。
在本发明一个较佳实施例中，所述的电源输入端接入高电压工作时，3触点和5触点连通，4触点和6触点连通。
在本发明一个较佳实施例中，所述的高电压是低电压的两倍关系。
在本发明一个较佳实施例中，所述的单相双压电动机采用电容运转电动机、电容起动电动机、电阻起动电动机、电容运转电容起动电动机、串激电动机和罩极电动机中的一种。
本发明的有益效果是：本发明的单相双压电动机用的热保护装置，由同时 具备高低电压保护的一个热保护器，改为由两个不同的大小热保护器来分别实现，通过电路的合理接线，来实现单相双压电动机在不同电压下的热保护功能，使用能绑扎在定子线包上的热保护器，节省电机空间，不需零件上另外设计安放装置，电机体积可以做的较小，大幅降低成本，缩短交货时间，提高了产品竞争力。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1是本发明单相双压电动机用的热保护装置的一较佳实施例的电路图，适用于罩极电动机和串激电动机连接热保护装置的电路图；
图2是与电容运转电动机连接热保护装置的副相绕组低压接法的电路图；
图3是与电容运转电动机连接热保护装置的副相绕组高压接法的电路图；
图4是与电容起动电动机连接热保护装置的副相绕组低压接法的电路图；
图5是与电容起动电动机连接热保护装置的副相绕组高压接法的电路图；
图6是与电阻起动电动机连接热保护装置的副相绕组低压接法的电路图；
图7是与电阻起动电动机连接热保护装置的副相绕组高压接法的电路图；
图8是与电容运转电容起动电动机连接热保护装置的副相绕组低压接法的电路图；
图9是与电容运转电容起动电动机连接热保护装置的副相绕组高压接法的电路图；
附图中的标记为：1、第一主相绕组，2、第二主相绕组，3、小电流热保护 器，4、大电流热保护器，5、双向开关，6、副相绕组，7、运转电容，8、离心器9、起动电容。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
如图1所示，本发明实施例包括：
一种单相双压电动机用的热保护装置，包括电机绕组、小电流热保护器3、大电流热保护器4以及双向开关5，所述的电机绕组包括主相绕组，或主相绕组和副相绕组，所述的主相绕组分为两部分，包括第一主相绕组1和第二主相绕组2，所述的小电流热保护器3一端串联连接在第一主相绕组1的一端U1或另一端U2，所述的小电流热保护器3一端和大电流热保护器4的一端还与电源输入端分别相连接，所述的大电流热保护器4的一端串联连接在第二主相绕组2的一端U4，所述的双向开关5分别与小电流热保护器3、大电流热保护器4、第一主相绕组1的另一端U2和第二主相绕组2的另一端U3相连接。
上述中，所述的第一主相绕组1和第二主相绕组2串联或并联连接。
本实施例中，所述的小电流热保护器3采用承载电流0-40A的热保护器，例如17AM或其他类似的热保护器，用于高电压下电机热保护；所述的大电流热保护器4采用承载电流0-80A的热保护器，例如8AM或类似的热保护器，用于低电压下电机热保护。
进一步的，所述的双向开关5可以是滑动开关或按钮船形开关中的一种，采用六触点，包括1、2、3、4、5、6触点。通过移动滑块，用于高低电压线路 切换，其中，所述的5触点和6触点预先短接。
所述的电源输入端接入低电压工作时，1触点和3触点连通，2触点和4触点连通；所述的电源输入端接入高电压工作时，3触点和5触点连通，4触点和6触点连通。其中，所述的高电压是低电压的两倍关系，例如230/115，460/230V等。
再进一步扩展电路，所述的单相双压电动机用的热保护装置还包括副相绕组6，所述的副相绕组6的一端A1连接第一主相绕组1的一端U2或另一端U1，副相绕组6的另一端A2与第二主相绕组2的一端U4直接连接或间接(或通过电容或通过离心器)连接。
高电压接线，小电流热保护器3串接在第一主相绕组1中，第一主相绕组1和第二主相绕组2两个绕组串联，其中第二主相绕组2再与副相绕组6并联，然后连接大电流热保护器4。
单相双压电动机动作异常时，小电流热保护器3感温达到断开温度，切断电路，第一主相绕组1、第二主相绕组2和副相绕组6均断电，保护电机绕组不被烧毁。
低电压接线，小电流热保护器3串接在第一主相绕组1中，第一主相绕组1和第二主相绕组2与副相绕组6三个线圈并联，然后连接大电流热保护器4。
单相双压电动机动作异常时，大电流热保护器4感温达到断开温度，切断电路，第一主相绕组1、第二主相绕组2和副相绕组6均断电，保护电机绕组不被烧毁。
如图2至图9可适用于单相类型双电压电动机，本实施例中，所述的单相双压电动机7可以是电容运转电动机、电容起动电动机、电阻起动电动机、电容运转电容起动电动机、串激电动机或罩极电动机中的一种。
参考图2，仅以电容运转电动机作具体说明：
1.电源输入端接入高电压，一端电流经过节点a，通过小电流热保护器3，进入第一主相绕组1，然后流入双向开关5，依次通过3564触点，流入节点b，因副相绕组6和第二主相绕组2并联，此时电流分为两路并行，一路流入第二主相绕组2；另一路流入副相绕组6，流经电容器与通过第二主相绕组2的电流汇入节点c，流经节点d，进入大电流热保护器4，进入电源输入端另一端，完成高压回路。
说明：采用副相绕组低压接法，小电流热保护器3与大电流热保护器4串联(流经2个保护器的电流相同)，因电流小，故起保护作用的是小电流热保护器3，而大电流热保护器4不会动作。
2.电源输入端接入低电压，一端电流经过节点a，此时电流分2路，一路通过小电流热保护器3，进入第一主相绕组1，然后流入双向开关5，通过触点3和1触点，流入节点d，进入大电流热保护器4，进入电源输入端另一端，完成一个回路。
另一路电流流入双向开关5，依次通过2和4触点，流入节点b，电流又分两路并行，一路流入第二主相绕组2；另一路流入副相绕组6，流经电容器与通过第二主相绕组2的电流汇入节点c，流经节点d，进入大电流热保护器4，进入电源输入端另一端，完成另一回路。
说明：采用副相绕组低压接法，小电流热保护器3保护第一主相绕组1，而大电流热保护器4同时保护第一主相绕组1、第二主相绕组2和副相绕组6。大电流热保护器4因大电流动作，此时小电流热保护器3不动作。
综上所述，本发明的单相双压电动机用的热保护装置，由同时具备高低电压保护的一个热保护器，改为由两个不同的大小热保护器，通过电路的合理接 线，来实现单相双压电动机在不同电压下的热保护功能，使用可绑扎在定子线包上的热保护器，节省电机空间，不需零件上另外设计安放装置，电机体积可以做的较小，大幅降低成本，缩短交货时间，提高了产品竞争力。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种单相双压电动机用的热保护装置，其特征在于，包括电机绕组、小电流热保护器、大电流热保护器以及双向开关，所述的电机绕组包括主相绕组，或主相绕组和副相绕组，所述的主相绕组分为两部分，包括第一主相绕组和第二主相绕组，所述的小电流热保护器串联连接第一主相绕组，所述的大电流热保护器串联连接第二主相绕组，或串联连接第二主相绕组和副相绕组，所述的小电流热保护器和大电流热保护器的一端还分别连接在电源输入端，所述的双向开关分别与小电流热保护器、大电流热保护器、第一主相绕组的输出端和第二主相绕组的另一端相连接。
  2. 根据权利要求1所述的单相双压电动机用的热保护装置，其特征在于，所述的第一主相绕组和第二主相绕组连接方式为：通过双向开关完成第一主相绕组和第二主相绕组的高压下串联和低压下并联。
  3. 根据权利要求1所述的单相双压电动机用的热保护装置，其特征在于，所述的小电流热保护器采用承载电流0-40A的热保护器，所述的大电流热保护器采用承载电流0-80A的保护器。
  4. 根据权利要求3所述的单相双压电动机用的热保护装置，其特征在于，所述的电源输入端接入高电压工作时，小电流热保护器起作用；所述的电源输入端接入低电压工作时，大电流保护器起作用。
  5. 根据权利要求1所述的单相双压电动机用的热保护装置，其特征在于，所述的双向开关是滑动开关或按钮船形开关中的一种，采用六触点，包括1、2、3、4、5、6触点。
  6. 根据权利要求5所述的单相双压电动机用的热保护装置，其特征在于，所述的5触点和6触点短接。
  7. 根据权利要求5所述的单相双压电动机用的热保护装置，其特征在于， 所述的电源输入端接入低电压工作时，1触点和3触点连通，2触点和4触点连通。
  8. 根据权利要求5所述的单相双压电动机用的热保护装置，其特征在于，所述的电源输入端接入高电压工作时，3触点和5触点连通，4触点和6触点连通。
  9. 根据权利要求1所述的单相双压电动机用的热保护装置，其特征在于，所述的高电压是低电压的两倍关系。
  10. 根据权利要求1所述的单相双压电动机用的热保护装置，其特征在于，所述的单相双压电动机采用电容运转电动机、电容起动电动机、电阻起动电动机、电容运转电容起动电动机、串激电动机和罩极电动机中的一种。
PCT/CN2018/091313 2018-05-25 2018-06-14 一种单相双压电动机用的热保护装置 WO2019223042A1 (zh)

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