CN204068203U - Household electrical appliance frequency conversion drive loop charging circuit protective device - Google Patents
Household electrical appliance frequency conversion drive loop charging circuit protective device Download PDFInfo
- Publication number
- CN204068203U CN204068203U CN201420487592.XU CN201420487592U CN204068203U CN 204068203 U CN204068203 U CN 204068203U CN 201420487592 U CN201420487592 U CN 201420487592U CN 204068203 U CN204068203 U CN 204068203U
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- China
- Prior art keywords
- contact protector
- electrochemical capacitor
- protector
- electrical appliance
- frequency conversion
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Abstract
The utility model discloses a kind of household electrical appliance frequency conversion drive loop charging circuit protective device, relate to circuit board, comprise contact protector, master relay, rectifier bridge and electrochemical capacitor; Contact protector is in parallel with master relay, access mains electricity input end, contact protector one end, and the other end is connected with electrochemical capacitor one end pin by rectifier bridge; Electrochemical capacitor other end pin is connected with DC output end, and the internal package of contact protector has semistor, and outside is coated with ceramic case and encapsulates, and ceramic case is connected with circuit board by conductive pin.The utility model just plays the effect of restriction charging current and protection relay contact under normal circumstances.When other partial circuits break down, contact protector is caused to work under exceeding the quata to determine power condition for a long time, when its internal temperature exceedes operating temperature; then this contact protector is in open circuit; after trouble shooting, this contact protector recovers normal temperature, still can normally work.
Description
Technical field
The utility model relates to field of household appliances, particularly relates to a kind of household electrical appliance frequency conversion drive loop charging circuit protective device.
Background technology
In the various motors that current household electrical appliance use, variable-frequency motor (DC frequency-changing, AC frequency conversion) is due to the superior performance such as energy-conservation, low noise, and be more and more subject to the favor of producer and consumer, its proportion also more comes about high.Variable-frequency motor driver is a complicated Circuits System, and the AC rectification of civil power is become direct current by it, then direct current is become by inverter the alternating current that amplitude and frequency can change and supply to motor, thus controls rotating speed and the torque of motor.In variable-frequency motor driver, have the parts that important, it suppresses the contact of the electric current of charge circuit, protective loop repeat circuit, can play a protective role by segment circuit when back-end circuit is abnormal.Usually we are referred to as contact protector (or the resistance that powers on), and this protector mainly contains two kinds of structures at present, and a kind of is that independent wire-wound power resistor uses, and one is the use that wire-wound power resistor and irrecoverable Thermal Cutoffs is packaged together.All there is expendable problem in above two kinds of structures.
Utility model content
For the problems referred to above; the utility model provides a kind of recovered contact protector with insulation, fire-retardant, withstand voltage, anti-riot characteristic; i.e. household electrical appliance frequency conversion drive loop charging circuit protective device; be used for suppressing charging current, protection relay contact; can the loop of segment in time when breaking down, pending fault can recover normal after removing.
In order to solve the problem, the technical scheme that the utility model provides is: a kind of household electrical appliance frequency conversion drive loop charging circuit protective device, relates to circuit board, it is characterized in that, comprise contact protector, master relay, rectifier bridge and electrochemical capacitor; Described contact protector is in parallel with master relay, access mains electricity input end, described contact protector one end, and the other end is connected with electrochemical capacitor one end pin by rectifier bridge; Described electrochemical capacitor other end pin is connected with DC output end; the internal package of described contact protector has semistor; outside is coated with ceramic case and encapsulates; described ceramic case is connected with circuit board by conductive pin; pottery has insulation, the characteristic such as fire-retardant, withstand voltage, anti-riot, can play a very good protection, even if when other circuit break down; this contact protector guarantee segment loop while, the element of surrounding of can not exploding or ignite.
Preferably, the internal package of described contact protector have wire-wound power resistor with can recovery temperature fuse, described wire-wound power resistor with can be in parallel and be connected by recovery temperature fuse.
The beneficial effects of the utility model are: (1) the utility model possesses certain resistance; in parallel with the relay of master control; can not by the rush of current suddenlyd change when power supply is connected for the protection of the electric capacity in drive circuit, rectifier bridge and miscellaneous part; thus the life-span of elongate member, reduce failure rate.When subsequent conditioning circuit occurs abnormal, this device meeting self-heating, when temperature exceedes the temperature spot of this device setting, automatically can cut off charge circuit, play a protective role.Remove when subsequent conditioning circuit is abnormal, this device can continue normal work after recovering normal temperature.(2) the utility model has insulation, fire-retardant, withstand voltage, anti-riot characteristic.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model contact protector embodiment one;
Fig. 3 is the structural representation of the utility model contact protector embodiment two.
In figure: 1 is semistor, 2 is conductive pin, and 3 is wire-wound power resistor, and 4 is can recovery temperature fuse.
Embodiment
Below the utility model is described further:
Embodiment one:
Composition graphs 1, Fig. 2, a kind of household electrical appliance frequency conversion drive loop charging circuit protective device, relates to circuit board, comprises contact protector, master relay, rectifier bridge and electrochemical capacitor, contact protector is in parallel with master relay, access mains electricity input end, contact protector one end, and the other end is connected with electrochemical capacitor one end pin by rectifier bridge, electrochemical capacitor other end pin is connected with DC output end, the internal package of contact protector has semistor 1, its resistance value of semistor 1 presents the increase of step evolution along with the rising of PTC thermistor body temperature, temperature is higher, resistance value is larger, just open circuit is there will be when resistance value reaches certain value, protective circuit, when temperature returns to critical point gradually, circuit conducting can recover normal again, outside is coated with ceramic case and encapsulates, ceramic case is connected with circuit board by conductive pin 2, pottery has insulation, fire-retardant, withstand voltage, the characteristic such as anti-riot, can play a very good protection, even if when other circuit break down, this contact protector is while guarantee segment loop, can not explode or ignite the element of surrounding.
Embodiment two:
Composition graphs 1, Fig. 3, a kind of household electrical appliance frequency conversion drive loop charging circuit protective device, relates to circuit board, comprises contact protector, master relay, rectifier bridge and electrochemical capacitor, contact protector is in parallel with master relay, access mains electricity input end, contact protector one end, and the other end is connected with electrochemical capacitor one end pin by rectifier bridge, electrochemical capacitor other end pin is connected with DC output end, the internal package of contact protector have wire-wound power resistor 3 with can recovery temperature fuse 4, wire-wound power resistor 3 with can be in parallel and be connected by recovery temperature fuse 4, can recovery temperature fuse temperature raise time short circuit, circuit disconnects and shielding, after temperature return reduces, connect normal work voluntarily, do not need to change fuse can work on, outside is coated with ceramic case and encapsulates, ceramic case is connected with circuit board by conductive pin 2, pottery has insulation, fire-retardant, withstand voltage, the characteristic such as anti-riot, can play a very good protection, even if when other circuit break down, this contact protector is while guarantee segment loop, can not explode or ignite the element of surrounding.
Operation principle of the present utility model: under normal circumstances, this contact protector just plays the effect of restriction charging current and protection relay contact.When other partial circuits break down, contact protector is caused to work under exceeding the quata to determine power condition for a long time, when its internal temperature exceedes operating temperature; then this contact protector is in open circuit; after trouble shooting, this contact protector recovers normal temperature, still can normally work.
The beneficial effects of the utility model are: (1) the utility model possesses certain resistance; in parallel with the relay of master control; can not by the rush of current suddenlyd change when power supply is connected for the protection of the electric capacity in drive circuit, rectifier bridge and miscellaneous part; thus the life-span of elongate member, reduce failure rate.When subsequent conditioning circuit occurs abnormal, this device meeting self-heating, when temperature exceedes the temperature spot of this device setting, automatically can cut off charge circuit, play a protective role.Remove when subsequent conditioning circuit is abnormal, this device can continue normal work after recovering normal temperature.(2) the utility model has insulation, fire-retardant, withstand voltage, anti-riot characteristic.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. household electrical appliance frequency conversion drive loop charging circuit protective device, relates to circuit board, it is characterized in that, comprises contact protector, master relay, rectifier bridge and electrochemical capacitor; Described contact protector is in parallel with master relay, access mains electricity input end, described contact protector one end, and the other end is connected with electrochemical capacitor one end pin by rectifier bridge; Described electrochemical capacitor other end pin is connected with DC output end, and the internal package of described contact protector has semistor, and outside is coated with ceramic case and encapsulates, and described ceramic case is connected with circuit board by conductive pin.
2. household electrical appliance frequency conversion drive loop according to claim 1 charging circuit protective device; it is characterized in that; the internal package of described contact protector have wire-wound power resistor with can recovery temperature fuse, described wire-wound power resistor with can be in parallel and be connected by recovery temperature fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420487592.XU CN204068203U (en) | 2014-08-27 | 2014-08-27 | Household electrical appliance frequency conversion drive loop charging circuit protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420487592.XU CN204068203U (en) | 2014-08-27 | 2014-08-27 | Household electrical appliance frequency conversion drive loop charging circuit protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204068203U true CN204068203U (en) | 2014-12-31 |
Family
ID=52209651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420487592.XU Expired - Fee Related CN204068203U (en) | 2014-08-27 | 2014-08-27 | Household electrical appliance frequency conversion drive loop charging circuit protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204068203U (en) |
-
2014
- 2014-08-27 CN CN201420487592.XU patent/CN204068203U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20200827 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |