CN113927282A - Uninterrupted power supply's high-frequency heating dismantles screw device - Google Patents
Uninterrupted power supply's high-frequency heating dismantles screw device Download PDFInfo
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- CN113927282A CN113927282A CN202111214750.5A CN202111214750A CN113927282A CN 113927282 A CN113927282 A CN 113927282A CN 202111214750 A CN202111214750 A CN 202111214750A CN 113927282 A CN113927282 A CN 113927282A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 37
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- 230000000087 stabilizing effect Effects 0.000 claims 1
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- 239000003990 capacitor Substances 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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Abstract
The invention discloses a high-frequency heating screw dismounting device with uninterrupted power supply, which comprises a rectification loop, a direct current control loop, a charge and discharge control loop, an inversion control loop, a load loop, a storage battery pack module, a temperature sensor, a voltage sensor and a control protection module, wherein the rectification loop is connected with the direct current control loop; the direct current control loop is connected with the rectifying loop and the charging and discharging control loop, the inversion control loop is connected with the charging and discharging control loop and the load loop, and the control protection module is connected with the direct current control loop, the charging and discharging control loop, the temperature sensor, the voltage sensor and the inversion control loop; the inversion control loop controls power output by adopting segmented regulation processing and controls stable output of output power by adopting stable regulation processing; the adjustable control of the output power and the stable output of the control output power are realized through the sectional adjustment processing and the stable adjustment processing.
Description
Technical Field
The invention relates to the technical field of high-frequency heating, in particular to a high-frequency heating screw dismounting device with uninterrupted power supply.
Background
At present, the screws are rusted and cannot be disassembled, so that the screws cannot be overhauled, and a large amount of manpower and material resources are delayed. Disassembling means such as a wrench, a pneumatic hammer, a flame welding and the like are used for disassembling the rusted screw, but the serious rusted screw cannot be disassembled due to the fact that the edge of the screw is ground to be more difficult to disassemble due to excessive force; the screw heating output power fluctuation is large and unstable in the high-frequency heating process, and the screw is easy to detach due to difficulty in controlling the heating temperature or too high heating temperature.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the high-frequency heating screw dismounting device with uninterrupted power supply, so that the heating output power is adjustable and the output power is stable.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-frequency heating screw dismounting device with uninterrupted power supply comprises a rectification loop, a direct current control loop, a charge-discharge control loop, an inversion control loop, a load loop, a temperature sensor, a voltage sensor and a control protection module; the control protection module is connected with the direct current control loop, the charge and discharge control loop, the load loop, the temperature sensor, the voltage sensor and the inversion control loop; the rectification loop rectifies the alternating-current voltage to output direct-current voltage, the direct-current control loop performs chopping voltage reduction processing on the direct-current voltage output by the rectification loop to output working voltage, the charge-discharge control loop performs charging or discharging according to the working voltage output by the direct-current control loop, and the inversion control loop controls power output by adopting sectional processing.
Furthermore, the input end of the rectification loop is connected with an alternating current power supply, and the output end of the rectification loop is connected with the input end of the direct current control loop; the rectification loop rectifies the alternating voltage by adopting single-phase uncontrolled rectification of capacitance filtering to output direct voltage.
Furthermore, the input end of the direct current control loop is connected with the output end of the rectification loop, and the output end of the direct current control loop is connected with the charge and discharge control loop; the direct current control loop performs chopping voltage reduction processing on the direct current voltage output by the rectifying loop to output working voltage; the direct current control loop receives the PWM signal sent by the control protection module, the direct current control loop adopts a direct current PWM chopper circuit, and the direct current control loop performs chopping and voltage reduction processing on direct current voltage output by the rectifying loop.
Furthermore, the input end of the charge and discharge control loop is connected with the direct current control loop, and the output end of the charge and discharge control loop is connected with the direct current control loop; the charging and discharging control circuit carries out charging or discharging according to the working voltage output by the direct current control circuit.
Further, when the voltage signal of the storage battery pack collected by the control protection module is lower than or equal to the charging voltage, the control protection module outputs a charging signal to the charging and discharging control loop to charge the storage battery pack; when the voltage signal of the storage battery pack collected by the control protection module is greater than the discharge voltage, the control protection module outputs a charging stop signal to the charging and discharging control loop to stop charging the storage battery pack.
Further, if the control protection module collects that the alternating voltage signal of the input end of the rectification loop is greater than or equal to the set voltage, the control protection module closes the storage battery pack, and an alternating current power supply is used as a power supply, or the storage battery pack is charged; and if the control protection module acquires that the input end alternating voltage signal of the rectification loop is less than the set voltage, the control protection module turns on the storage battery pack which is used as a power supply.
Furthermore, the input end of the inversion control loop is connected with the output end of the direct current control loop and the output end of the charge-discharge control loop, and the output end of the inversion control loop is connected with the input end of the load loop; the inversion control loop adopts segmented regulation to process and control the output power.
Further, the segment adjustment processing specifically includes:
when the power output is 0.05-25% Pmax, controlling the duty ratio of the driving signals of the switching tube Q1 and the switching tube Q2 to be kept at 50%, closing the switching tube Q3, and controlling the duty ratio of the driving signal of the switching tube Q4 not to be equal to 50%, so that the working state of the inverter control loop is a half-bridge working state, and the output voltage is unipolar; the output voltage of the series resonant circuit is changed by adjusting the control angle alpha, so that the output power is adjusted by changing the output voltage, and the calculation formula of the output power is as follows:
where P is the output power, PmaxAt maximum output power, T is the pulse density period, TonIs the power output time within the pulse density period.
When the power is output at 25% -100% Pmax, the duty ratio of the driving signals for controlling the switch tube Q1 and the switch tube Q2 is kept at 50%, the duty ratio of the driving signals for controlling the switch tube Q3 and the switch tube Q4 is not equal to 50%, the output voltage of the series resonant circuit is changed by adjusting the control angle alpha, so that the output power is adjusted by changing the output voltage, and the calculation formula of the output power is as follows:
in the formula of Uout1To output a voltage, UinIs input voltage, P is output power, Q is quality factor, wnTo shift the angle of phase, PmaxTo maximum output power, Uout1maxAlpha is the control angle for the maximum output voltage.
Further, the inverter control loop adopts stable regulation to process and control the output power to be stably output, and the stable regulation specifically comprises:
the control protection module sets each power output value to have a corresponding pulse density value;
the control protection module sets a corresponding power output value for the shift angle value;
the control protection module carries out four-bit coding on the pulse signals, generates pulse density value driving signals according to the moving angle and sends the pulse density value driving signals to the inversion control loop.
Furthermore, the input end of the load loop is connected with the output end of the inversion control loop; the load coil for high-frequency heating of the screw is cylindrical, and a heating object is placed in the load coil for heating. When a high-frequency alternating current is applied to the coil, an alternating magnetic field is induced in the coil, an eddy current is generated in the heated workpiece, and the heated object is heated. To achieve load matching, a high frequency transformer is used, which may be equivalent to a circuit in which an inductor L and a resistor R are connected in series. In order to realize a series resonant circuit, a load loop is connected in series with a capacitor C, and parameters of the circuit in a resonant state, namely a power factor of 1, and load impedance of R.
Furthermore, the control protection module is connected with the direct current control loop, the charging and discharging control loop, the temperature sensor, the voltage sensor and the inversion control loop; the control protection module sends a PWM signal to the direct current control loop; the control protection module sends a charging signal or a discharging signal to the charging and discharging control loop, and the charging and discharging control loop receives the charging signal or the discharging signal sent by the control protection module; the temperature sensor collects a heating object temperature signal and transmits the heating object temperature signal to the control protection module, the control protection module receives the heating object temperature signal sent by the temperature sensor, if the heating object temperature signal is greater than or equal to a set temperature, the control protection module sends a heating stopping signal to the load loop, and the load loop executes heating stopping on the heating object; the control protection module sends a pulse density value driving signal to the inversion control loop, and the inversion control loop receives the pulse density value driving signal sent by the control protection module; the voltage sensor collects an input end alternating voltage signal of the rectification loop, a storage battery pack voltage signal and an inversion control loop voltage signal and transmits the signals to the control protection module, and the control protection module receives the inversion control loop voltage signal, the storage battery pack voltage signal and the inversion control loop voltage signal sent by the voltage sensor.
The invention has the beneficial effects that: a high-frequency heating screw dismounting device with uninterrupted power supply realizes adjustable control of output power and stable output of control output power through segmented adjustment processing and stable adjustment processing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-frequency heating screw dismounting device with uninterrupted power supply according to the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The first embodiment is as follows:
a high-frequency heating screw dismounting device with uninterrupted power supply comprises a rectification loop, a direct current control loop, a charge-discharge control loop, an inversion control loop, a load loop, a temperature sensor, a voltage sensor and a control protection module; the control protection module is connected with the direct current control loop, the charge and discharge control loop, the load loop, the temperature sensor, the voltage sensor and the inversion control loop; the rectification loop rectifies the alternating-current voltage to output direct-current voltage, the direct-current control loop performs chopping voltage reduction processing on the direct-current voltage output by the rectification loop to output working voltage, the charge-discharge control loop performs charging or discharging according to the working voltage output by the direct-current control loop, and the inversion control loop controls power output by adopting sectional processing.
The rectification circuit is connected with the direct current control circuit, the input end of the rectification circuit is connected with the alternating current power supply, and the output end of the rectification circuit is connected with the input end of the direct current control circuit; the rectification loop rectifies the alternating voltage by adopting single-phase uncontrolled rectification of capacitance filtering to output direct voltage.
The DC control loop is connected with the charge-discharge control loop, the input end of the DC control loop is connected with the output end of the rectification loop, and the output end of the DC control loop is connected with the charge-discharge control loop; the direct current control loop performs chopping voltage reduction processing on the direct current voltage output by the rectifying loop to output working voltage; the direct current control loop receives the PWM signal sent by the control protection module, the direct current control loop adopts a direct current PWM chopper circuit, and the direct current control loop performs chopping and voltage reduction processing on direct current voltage output by the rectifying loop.
The charging and discharging control loop is connected with the inversion control loop, the input end of the charging and discharging control loop is connected with the direct current control loop, and the output end of the charging and discharging control loop is connected with the inverter control loop; the charging and discharging control circuit carries out charging or discharging according to the working voltage output by the direct current control circuit; when the voltage signal of the storage battery pack collected by the control protection module is lower than or equal to the charging voltage, the control protection module outputs a charging signal to the charging and discharging control loop to charge the storage battery pack; when the voltage signal of the storage battery pack collected by the control protection module is greater than the discharge voltage, the control protection module outputs a charging stop signal to the charging and discharging control loop to stop charging the storage battery pack; if the control protection module collects that the input end alternating voltage signal of the rectification loop is greater than or equal to the set voltage, the control protection module closes the storage battery pack, and an alternating current power supply is used as a power supply or charges the storage battery pack; and if the control protection module acquires that the input end alternating voltage signal of the rectification loop is less than the set voltage, the control protection module turns on the storage battery pack which is used as a power supply.
The inverter control loop is connected with the load loop, the input end of the inverter control loop is connected with the output end of the direct current control loop and the output end of the charge and discharge control loop, and the output end of the inverter control loop is connected with the input end of the load loop; the inversion control loop adopts the sectional regulation to process and control the output power, and the sectional regulation specifically comprises the following steps:
when the power output is 0.05-25% Pmax, controlling the duty ratio of the driving signals of the switching tube Q1 and the switching tube Q2 to be kept at 50%, closing the switching tube Q3, and controlling the duty ratio of the driving signal of the switching tube Q4 not to be equal to 50%, so that the working state of the inverter control loop is a half-bridge working state, and the output voltage is unipolar; the output voltage of the series resonant circuit is changed by adjusting the control angle alpha, so that the output power is adjusted by changing the output voltage, and the calculation formula of the output power is as follows:
where P is the output power, PmaxAt maximum output power, T is the pulse density period, TonIs the power output time within the pulse density period.
When the power is output at 25% -100% Pmax, the duty ratio of the driving signals for controlling the switch tube Q1 and the switch tube Q2 is kept at 50%, the duty ratio of the driving signals for controlling the switch tube Q3 and the switch tube Q4 is not equal to 50%, the output voltage of the series resonant circuit is changed by adjusting the control angle alpha, so that the output power is adjusted by changing the output voltage, and the calculation formula of the output power is as follows:
in the formula of Uout1To output a voltage, UinIs input voltage, P is output power, Q is quality factor, wnTo shift the angle of phase, PmaxTo maximum output power, Uout1maxAlpha is the control angle for the maximum output voltage.
The inverter control loop adopts stable regulation to process and control the stable output of output power, and the stable regulation specifically comprises:
the control protection module sets each power output value to have a corresponding pulse density value;
the control protection module sets a corresponding power output value for the shift angle value;
the control protection module carries out four-bit coding on the pulse signals, generates pulse density value driving signals according to the moving angle and sends the pulse density value driving signals to the inversion control loop.
The input end of the load loop is connected with the output end of the inversion control loop; the load coil for high-frequency heating of the screw is cylindrical, and a heating object is placed in the load coil for heating. When a high-frequency alternating current is applied to the coil, an alternating magnetic field is induced in the coil, an eddy current is generated in the heated workpiece, and the heated object is heated. To achieve load matching, a high frequency transformer is used, which may be equivalent to a circuit in which an inductor L and a resistor R are connected in series. In order to realize a series resonant circuit, a load loop is connected in series with a capacitor C, and parameters of the circuit in a resonant state, namely a power factor of 1, and load impedance of R.
The control protection module is connected with the direct current control loop, the charging and discharging control loop, the temperature sensor, the voltage sensor and the inversion control loop; the control protection module sends a PWM signal to the direct current control loop; the control protection module sends a charging signal or a discharging signal to the charging and discharging control loop, and the charging and discharging control loop receives the charging signal or the discharging signal sent by the control protection module; the temperature sensor collects a heating object temperature signal and transmits the heating object temperature signal to the control protection module, the control protection module receives the heating object temperature signal sent by the temperature sensor, if the heating object temperature signal is greater than or equal to a set temperature, the control protection module sends a heating stopping signal to the load loop, and the load loop executes heating stopping on the heating object; the control protection module sends a pulse density value driving signal to the inversion control loop, and the inversion control loop receives the pulse density value driving signal sent by the control protection module; the voltage sensor collects an input end alternating voltage signal of the rectification loop, a storage battery pack voltage signal and an inversion control loop voltage signal and transmits the signals to the control protection module, and the control protection module receives the inversion control loop voltage signal, the storage battery pack voltage signal and the inversion control loop voltage signal sent by the voltage sensor.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (6)
1. A high-frequency heating screw dismounting device with uninterrupted power supply is characterized by comprising a rectification loop, a direct current control loop, a charge-discharge control loop, an inversion control loop, a load loop, a temperature sensor, a voltage sensor and a control protection module; the direct current control loop is connected with the rectification loop and the charging and discharging control loop, the inversion control loop is connected with the charging and discharging control loop and the load loop, and the control protection module is connected with the direct current control loop, the charging and discharging control loop, the temperature sensor, the voltage sensor and the inversion control loop; the charging and discharging control loop carries out charging or discharging according to the working voltage output by the direct current control loop, and the inversion control loop adopts sectional regulation processing to control power output and stable regulation processing to control output power stable output; the control protection module sends a PWM signal to the direct current control loop, the control protection module sends a charging signal or a discharging signal to the charging and discharging control loop, the temperature sensor collects a temperature signal of a heating object and transmits the temperature signal to the control protection module, the control protection module sends a pulse density value driving signal to the inversion control loop, and the voltage sensor collects an input end alternating current voltage signal of the rectifying loop, a storage battery pack voltage signal and an inversion control loop voltage signal and transmits the input end alternating current voltage signal, the storage battery pack voltage signal and the inversion control loop voltage signal to the control protection module.
2. The uninterruptedly powered high-frequency heating screw dismounting device according to claim 1, wherein the step-by-step adjusting process specifically includes:
when the power output is 0.05-25% Pmax, controlling the duty ratio of the driving signals of the switching tube Q1 and the switching tube Q2 to be kept at 50%, closing the switching tube Q3, and controlling the duty ratio of the driving signal of the switching tube Q4 not to be equal to 50%, so that the working state of the inverter control loop is a half-bridge working state, and the output voltage is unipolar; the output voltage of the series resonant circuit is changed by adjusting the control angle alpha, so that the output power is adjusted by changing the output voltage, and the calculation formula of the output power is as follows:
where P is the output power, PmaxAt maximum output power, T is the pulse density period, TonIs the power output time within the pulse density period;
when the power is output at 25% -100% Pmax, the duty ratio of the driving signals for controlling the switch tube Q1 and the switch tube Q2 is kept at 50%, the duty ratio of the driving signals for controlling the switch tube Q3 and the switch tube Q4 is not equal to 50%, the output voltage of the series resonant circuit is changed by adjusting the control angle alpha, so that the output power is adjusted by changing the output voltage, and the calculation formula of the output power is as follows:
in the formula of Uout1To output a voltage, UinIs input voltage, P is output power, Q is quality factor, wnTo shift the angle of phase, PmaxTo maximum output power, Uout1maxAlpha is the control angle for the maximum output voltage.
3. The uninterruptedly powered high-frequency heating screw dismounting device according to claim 1, wherein the stabilizing adjustment process specifically includes:
the control protection module sets each power output value to have a corresponding pulse density value;
the control protection module sets a corresponding power output value for the shift angle value;
the control protection module carries out four-bit coding on the pulse signals, generates pulse density value driving signals according to the moving angle and sends the driving signals to the inversion control loop.
4. The uninterruptedly powered high-frequency heating screw dismounting device according to claim 1, wherein the charging and discharging control circuit performs charging or discharging according to a working voltage output by the direct current control circuit; when the voltage signal of the storage battery pack collected by the control protection module is lower than or equal to the charging voltage, the control protection module outputs a charging signal to a charging and discharging control loop to charge the storage battery pack; when the voltage signal of the storage battery pack collected by the control protection module is greater than the discharge voltage, the control protection module outputs a charging stop signal to the charging and discharging control loop to stop charging the storage battery pack.
5. The uninterruptedly powered high-frequency heating screw dismounting device according to claim 1, wherein if the ac voltage signal at the input end of the control protection module collected rectification loop is greater than or equal to a set voltage, the control protection module turns off the storage battery pack, uses an ac power supply as a power supply, or charges the storage battery pack; and if the control protection module acquires that the input end alternating voltage signal of the rectification loop is less than the set voltage, the control protection module turns on the storage battery pack which is used as a power supply.
6. The high-frequency heating screw dismounting device with uninterruptible power supply according to claim 1, wherein the temperature sensor collects a temperature signal of the object to be heated and transmits the signal to the control protection module, and if the temperature signal of the object to be heated is greater than or equal to a set temperature, the control protection module sends a heating stop signal to a load circuit, and the load circuit stops heating the object to be heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214750.5A CN113927282A (en) | 2021-10-19 | 2021-10-19 | Uninterrupted power supply's high-frequency heating dismantles screw device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214750.5A CN113927282A (en) | 2021-10-19 | 2021-10-19 | Uninterrupted power supply's high-frequency heating dismantles screw device |
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| CN113927282A true CN113927282A (en) | 2022-01-14 |
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| CN202111214750.5A Pending CN113927282A (en) | 2021-10-19 | 2021-10-19 | Uninterrupted power supply's high-frequency heating dismantles screw device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0787686A (en) * | 1993-09-17 | 1995-03-31 | Fuji Electric Co Ltd | Uninterruptible power supply |
| US6175511B1 (en) * | 1999-12-24 | 2001-01-16 | Mitsubishi Denki Kabushiki Kaisha | Uninterruptable power supply |
| JP2003300121A (en) * | 2002-04-02 | 2003-10-21 | Mitsubishi Heavy Ind Ltd | Bolt heater |
| JP2004167642A (en) * | 2002-11-21 | 2004-06-17 | Chubu Plant Service Co Ltd | Device and working method for making bolt (nut) loosening operation with higher efficiency |
| CN207522033U (en) * | 2017-10-09 | 2018-06-22 | 广西电网有限责任公司贺州供电局 | The automatic heating screw dismounting device and its temperature-controlling module of a kind of temperature sensing |
| CN109366094A (en) * | 2018-11-25 | 2019-02-22 | 大同煤矿集团有限责任公司 | Get rusty bolt looseness device |
| CN209016722U (en) * | 2018-12-04 | 2019-06-21 | 国网湖北省电力有限公司电力科学研究院 | A kind of power cell and power cell control system |
-
2021
- 2021-10-19 CN CN202111214750.5A patent/CN113927282A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0787686A (en) * | 1993-09-17 | 1995-03-31 | Fuji Electric Co Ltd | Uninterruptible power supply |
| US6175511B1 (en) * | 1999-12-24 | 2001-01-16 | Mitsubishi Denki Kabushiki Kaisha | Uninterruptable power supply |
| JP2003300121A (en) * | 2002-04-02 | 2003-10-21 | Mitsubishi Heavy Ind Ltd | Bolt heater |
| JP2004167642A (en) * | 2002-11-21 | 2004-06-17 | Chubu Plant Service Co Ltd | Device and working method for making bolt (nut) loosening operation with higher efficiency |
| CN207522033U (en) * | 2017-10-09 | 2018-06-22 | 广西电网有限责任公司贺州供电局 | The automatic heating screw dismounting device and its temperature-controlling module of a kind of temperature sensing |
| CN109366094A (en) * | 2018-11-25 | 2019-02-22 | 大同煤矿集团有限责任公司 | Get rusty bolt looseness device |
| CN209016722U (en) * | 2018-12-04 | 2019-06-21 | 国网湖北省电力有限公司电力科学研究院 | A kind of power cell and power cell control system |
Non-Patent Citations (1)
| Title |
|---|
| 鞠佃军等: "多燃烧器电磁炉谐振逆变器PDM-AVC混合调功策略", 《电工技术》 * |
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