CN217335442U - Boost type resistance-adjusting power supply circuit for fitness equipment - Google Patents
Boost type resistance-adjusting power supply circuit for fitness equipment Download PDFInfo
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- CN217335442U CN217335442U CN202220182765.1U CN202220182765U CN217335442U CN 217335442 U CN217335442 U CN 217335442U CN 202220182765 U CN202220182765 U CN 202220182765U CN 217335442 U CN217335442 U CN 217335442U
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- current sampling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model provides a boost type resistance-adjusting power supply circuit for body-building apparatus, including rectification filter circuit, rectification filter circuit's positive output end is established ties there is the inductance, unidirectional conduction control element and electric capacity, the other end of electric capacity and rectification filter circuit's the equal ground connection of negative pole end, still include switching element, switching element's one end is connected between inductance and unidirectional conduction control element, switching element's other end ground connection, the both ends of electric capacity are connected with the load output respectively, electric capacity is reverse when unidirectional conduction control element is used for preventing the switching element disconnection to discharge to ground. When the switch element is switched on, the inductor charges, the capacitor discharges to provide large voltage for the load, when the switch element is switched off, the inductor releases stored energy to provide large voltage for the load, the capacitor charges, the load can always have higher and stable voltage through the matching of the inductor and the capacitor, and in addition, the duty ratio of the switch element is controlled through the PWM signal of the singlechip to realize the adjustment of resistance.
Description
Technical Field
The utility model relates to a body-building apparatus electric energy recovery circuit field, in particular to type that steps up accent hinders supply circuit for body-building apparatus.
Background
Carbon neutralization means that enterprises, groups or individuals measure and calculate the total amount of greenhouse gas emission generated directly or indirectly within a certain time, and the emission of carbon dioxide generated by the enterprises, the groups or the individuals is counteracted through the forms of afforestation, energy conservation, emission reduction and the like, so that zero emission of the carbon dioxide is realized.
Carbon neutralization, a new form of environmental protection, has been adopted by an increasing number of major activities and meetings. Carbon neutralization can promote green life and production and realize green development of the whole society.
In order to be matched with carbon neutralization, fitness equipment is arranged on the market, and a generator is matched with the fitness equipment, so that the fitness equipment can be used for generating electricity while building a body, and the effects of energy conservation and environmental protection are achieved. The generator works in a power generation state and is used for supplying power to the outside, such as charging a mobile phone or charging an external storage battery, and the generator is also used as a main resistance component of the fitness equipment, the generator is under the action of the reaction torque of electromagnetic force when in load, namely, resistance, when a user needs to improve exercise intensity, gears can be adjusted, the resistance is increased, when the resistance is increased, the electric energy output power can be reduced, and the resistance and the electric energy output are a set of contradictions. How to reconcile the contradictions becomes a common problem for such devices.
SUMMERY OF THE UTILITY MODEL
The utility model provides a type of stepping up resistance-adjusting supply circuit for body-building apparatus has solved the body-building equipment who is equipped with the generator, and the generator is as power generation part and resistance part, and when the resistance increase, electric energy output can reduce's defect.
The technical scheme of the utility model is realized like this:
the utility model provides a boost type resistance-adjusting power supply circuit for body-building apparatus, including being used for becoming the rectifier filter circuit of direct current output with the three-phase alternating current rectifier filter of input, rectifier filter circuit's positive output end is established ties there is the inductance, one-way conduction control element and electric capacity, the other end of electric capacity and rectifier filter circuit's negative pole end all ground connection, still include switching element, switching element's one end is connected between inductance and one-way conduction control element, switching element's other end ground connection, the both ends of electric capacity are connected with the load output respectively, electric capacity is reverse when one-way conduction control element is used for preventing the switching element disconnection to ground discharge.
As a further technical solution, the device further comprises a controller for controlling the switching element to be turned on and off.
As a further technical scheme, the device further comprises a current sampling device for collecting the total current of the direct current in the circuit, and the current sampling device is electrically connected with the controller.
As a further technical scheme, the current sampling device is a total current sampling resistor connected to the positive output end or the negative output end of the rectification filter circuit, two ends of the total current sampling resistor are connected in parallel with an amplifier III for amplifying voltage, and the amplifier III is electrically connected with the controller; or the current sampling device comprises a first current sampling resistor connected to one end of the switching element and a second current sampling resistor connected to one load output end, wherein two ends of the first current sampling resistor are connected in parallel with an amplifier I for amplifying voltage, and two ends of the second current sampling resistor are connected in parallel with an amplifier II for amplifying voltage; the amplifier I and the amplifier II are both electrically connected with the controller.
As a further technical scheme, the controller is a single chip microcomputer, the unidirectional conduction control element is a diode or a first MOS transistor, the switch element is a second MOS transistor or an IGBT transistor, and the single chip microcomputer is connected with the control ends of the first MOS transistor, the second MOS transistor and the IGBT transistor respectively.
As a further technical scheme, the single chip microcomputer controls the first MOS tube, the second MOS tube and the IGBT tube through PWM signals.
As a further technical solution, the switching elements are a plurality of second MOS transistors connected in parallel or a plurality of IGBT transistors connected in parallel.
As a further technical scheme, the second MOS tube is an N-channel enhanced MOS tube with a parasitic diode, a drain electrode of the N-channel enhanced MOS tube with the parasitic diode is connected between the inductor and the unidirectional conduction control element, a source electrode of the N-channel enhanced MOS tube with the parasitic diode is connected with one end of the first current sampling resistor, the other end of the first current sampling resistor is grounded, and a grid electrode of the first current sampling resistor is connected with the single chip microcomputer through an MOS tube driving circuit.
As a further technical scheme, the rectification filter circuit comprises three parallel rectification bridge arms and a filter capacitor, the rectification bridge arms comprise two forward series rectification diodes, and a three-phase alternating current access end is connected between the two rectification diodes.
The utility model has the advantages that:
1. the utility model provides an inductance has played simultaneously step up, has reduced the switching element ringing, has reduced the rectification electric capacity ripple, has reduced this 4 effects that switching element generates heat, if do not have this inductance, then electric capacity, switching element need very bigger heat-radiating equipment, will lead to the cost to improve greatly.
2. The unidirectional conduction control element is used for preventing the capacitor from reversely discharging to the ground when the switching element is closed, and preventing the storage battery from reversely discharging to the ground when the load is the storage battery.
3. When the switch element is closed, current flows into GND through the inductor, the GND is short-circuited to the ground, the inductor charges, the capacitor releases stored electric energy, a relatively large voltage is provided for a load, electric energy output is kept, when the switch element is disconnected, the inductor sends a relatively large voltage to the load output end in order to maintain the current, the electric energy is output to the load, and the electric energy output is kept.
4. After the single chip microcomputer is added, the duty ratio of the switching element is controlled through the PWM signal, the larger the duty ratio is, the higher the proportion of the electrifying time relative to the total time is in a pulse cycle is, the larger the current is, the resistance is in direct proportion to the current, the larger the resistance is, otherwise, the smaller the duty ratio is, the smaller the resistance is, and therefore the regulation and control of the resistance can be realized through the single chip microcomputer while the stable high-voltage output of the load output end is ensured.
5. After the current sampling device is added, the total current of the direct current can be collected and fed back to the single chip microcomputer, and the single chip microcomputer realizes accurate control according to the size of the fed-back total current.
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 these drawings without creative efforts.
Fig. 1 is a circuit connection diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a boost type resistance-adjusting power supply circuit for a fitness apparatus includes a rectifying and filtering circuit S1 for rectifying and filtering an input three-phase alternating current into a direct current for output, an inductor L2, a unidirectional conduction control element and a capacitor C5 are connected in series to an anode output end of the rectifying and filtering circuit S1, both the other end of the capacitor C5 and a cathode end of the rectifying and filtering circuit S1 are grounded, the boost type resistance-adjusting power supply circuit further includes a switch element, one end of the switch element is connected between the inductor L2 and the unidirectional conduction control element, the other end of the switch element is grounded, and both ends of the capacitor C5 are respectively connected with a load output end OUT. The utility model provides an inductance L2 has played simultaneously and has stepped up, reduced the switching element ringing, reduced the rectification electric capacity ripple, reduced this 4 effects of switching element generate heat, if do not have this inductance, then electric capacity C5, switching element need very bigger heat-radiating equipment, will lead to the cost to improve greatly. The unidirectional conduction control element is used for preventing the capacitor C5 from discharging to the ground reversely when the switch element is closed, and preventing the battery from discharging to the ground reversely when the load is the battery.
As a further technical solution, the device further comprises a controller for controlling the switching element to be turned on and off.
As a further technical scheme, the device further comprises a current sampling device for collecting the total current of the direct current in the circuit, and the current sampling device is electrically connected with the controller.
As a further technical solution, the current sampling device is a total current sampling resistor connected to the positive output end or the negative output end of the rectification filter circuit, two ends of the total current sampling resistor are connected in parallel with an amplifier III (not shown) for amplifying voltage, and the amplifier III is electrically connected with the controller; or the current sampling device comprises a first current sampling resistor R8 connected to one end of the switching element and a second current sampling resistor R22 connected to one load output end OUT, wherein an amplifier I (not shown) for amplifying voltage is connected in parallel with two ends of the first current sampling resistor R8, and an amplifier II (not shown) for amplifying voltage is connected in parallel with two ends of the second current sampling resistor R22; the amplifier I and the amplifier II are both electrically connected with the controller. After the current sampling device is added, the total current of the direct current can be collected, and the total current is
Wherein U is the voltage of the total current sampling resistor measured by the amplifier III after amplification, N is the multiple of the voltage amplified by the amplifier III, and R is the resistance value of the total current sampling resistor.
Or collecting branch current of each branch circuit, obtaining total current through the sum of the branch currents, and feeding the total current back to the singlechip, wherein the total current is
U1 is the amplified voltage of a first current sampling resistor R8 obtained by an amplifier I, N1 is the multiple of the amplified voltage of the amplifier I, R8 is the resistance value of the first current sampling resistor R8, U2 is the amplified voltage of a second current sampling resistor R22 obtained by an amplifier II, N2 is the multiple of the amplified voltage of the amplifier II, and R22 is the resistance value of the second current sampling resistor R22.
As a further technical solution, the controller selects a single chip microcomputer, and of course, the controller may also select other types of controllers such as an MCU, a PLC, and the like as needed, the unidirectional conduction control element selects the diode D9, and of course, the unidirectional conduction control element may also select the first MOS transistor as needed, the switching element selects the second MOS transistor Q8, and of course, the IGBT transistor as needed, and the single chip microcomputer is respectively connected to the first MOS transistor, the second MOS transistor Q8, and the control end of the IGBT transistor.
As a further technical scheme, the single chip microcomputer controls the first MOS transistor, the second MOS transistor Q8 and the IGBT transistor through a PWM signal. After the single chip microcomputer is added, the duty ratio of the switching element is controlled through the PWM signal, the larger the duty ratio is, the higher the proportion of the electrifying time relative to the total time is in a pulse cycle is, the larger the current is, the resistance is in direct proportion to the current, the larger the resistance is, otherwise, the smaller the duty ratio is, the smaller the resistance is, and therefore the regulation and control of the resistance can be realized through the single chip microcomputer while the stable high-voltage output of the load output end is ensured.
As a further technical solution, the switching elements are a plurality of second MOS transistors Q8 connected in parallel or a plurality of IGBT transistors connected in parallel.
As a further technical solution, the second MOS transistor Q8 is an N-channel enhancement type MOS transistor with a parasitic diode, a drain of the N-channel enhancement type MOS transistor with the parasitic diode is connected between the inductor L2 and the unidirectional conduction control element, a source of the N-channel enhancement type MOS transistor with the parasitic diode is connected to one end of the first current sampling resistor R8, the other end of the first current sampling resistor R8 is grounded, a gate of the N-channel enhancement type MOS transistor is connected to the single chip microcomputer through an MOS transistor driving circuit, the single chip microcomputer is connected to a control end of the first MOS transistor through a second MOS transistor driving circuit, and the single chip microcomputer is connected to a control end of the IGBT transistor through an IGBT transistor driving circuit.
As a further technical scheme, the rectifying and filtering circuit S1 includes three rectifying bridge arms and a filter capacitor C3 connected in parallel, each rectifying bridge arm includes two rectifying diodes D2 and D5 connected in series in a forward direction, and a three-phase alternating current access terminal is connected between the two rectifying diodes.
The utility model discloses a theory of operation:
when the second MOS transistor Q8 is turned on, the current L2 flows into GND through the inductor, and is short-circuited to ground, at this time, the current is maximum, and the resistance is also maximum, because the generator is under the action of the reaction torque (i.e. resistance) of the electromagnetic force when under load, the magnitude of the reaction torque is proportional to the load (i.e. current), at this time, the inductor L2 is charged, the capacitor C5 releases the stored electric energy, and provides a relatively large voltage to the load P1, so as to maintain the electric energy output, and the diode D9 can prevent the capacitor C5 from discharging to ground in the reverse direction; when the second MOS transistor Q8 is turned off, a current flows into the load P1 through the diode D9, the current becomes small, the resistance becomes small, the inductor L2 releases the stored energy in order to maintain the current, a relatively large voltage is provided for the load P1, the output of electric energy is kept, and the capacitor C5 is charged; therefore, through the matching of the inductor L2 and the capacitor C5, the load output end OUT always has a higher and stable voltage, namely, the smaller voltage at the VM is boosted to the larger voltage at the VL so as to maintain the electric energy output.
As can be seen from the above, the second MOS transistor Q8 is turned on, the current is large, the resistance is large, and the off current of the second MOS transistor Q8 is small, and the resistance is small.
pwm duty cycle is the proportion of the time of the high level in a pulse period to the whole period. The second MOS pipe Q8 switches on during the high level, and the second MOS pipe is disconnected Q8 and is opened during the low level, and the resistance is adjusted through pwm duty cycle to the singlechip, and the pwm duty cycle increases, and the electric current increases, and the resistance increases, and the pwm duty cycle reduces, and the electric current reduces, and the resistance reduces, reaches resistance control's purpose, simultaneously according to the size of the total current of feedback in the circuit, realizes the accurate control of resistance.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A boost type resistance-adjusting power supply circuit for fitness equipment is characterized in that: the three-phase alternating current rectifier filter circuit comprises a rectifier filter circuit for converting input three-phase alternating current into direct current for output, an inductor, a one-way conduction control element and a capacitor are connected in series with the positive output end of the rectifier filter circuit, the other end of the capacitor and the negative end of the rectifier filter circuit are all grounded, the three-phase alternating current rectifier filter circuit further comprises a switch element, one end of the switch element is connected between the inductor and the one-way conduction control element, the other end of the switch element is grounded, the two ends of the capacitor are respectively connected with a load output end, and the one-way conduction control element is used for preventing the capacitor from reversely discharging to the ground when the switch element is disconnected.
2. A boost-type resistance-regulating power supply circuit for use in an exercise apparatus as claimed in claim 1, wherein: the controller is used for controlling the switching element to be switched on and switched off.
3. A boost-type resistance-regulating power supply circuit for use in an exercise apparatus as claimed in claim 2, wherein: the current sampling device is used for collecting the total current of the direct current in the circuit and is electrically connected with the controller.
4. A boost-type resistance-regulating power supply circuit for use in an exercise apparatus as claimed in claim 3, wherein: the current sampling device is a total current sampling resistor connected to the positive output end or the negative output end of the rectification filter circuit, two ends of the total current sampling resistor are connected in parallel with an amplifier III for amplifying voltage, and the amplifier III is electrically connected with the controller; or the current sampling device comprises a first current sampling resistor connected to one end of the switching element and a second current sampling resistor connected to one load output end, wherein two ends of the first current sampling resistor are connected in parallel with an amplifier I for amplifying voltage, and two ends of the second current sampling resistor are connected in parallel with an amplifier II for amplifying voltage; the amplifier I and the amplifier II are both electrically connected with the controller.
5. The boost type resistance-regulating power supply circuit for fitness equipment as claimed in claim 4, wherein: the controller is a single chip microcomputer, the unidirectional conduction control element is a diode or a first MOS tube, the switch element is a second MOS tube or an IGBT tube, and the single chip microcomputer is respectively connected with the control ends of the first MOS tube, the second MOS tube and the IGBT tube.
6. A boost-type resistance-regulating power supply circuit for use in an exercise apparatus as claimed in claim 5, wherein: the single chip microcomputer controls the first MOS tube, the second MOS tube and the IGBT tube through PWM signals.
7. A boost-type resistance-regulating power supply circuit for use in an exercise apparatus as claimed in claim 5, wherein: the switching elements are a plurality of second MOS tubes connected in parallel or a plurality of IGBT tubes connected in parallel.
8. A boost-type resistance-regulating power supply circuit for use in an exercise apparatus according to any one of claims 5-7, wherein: the second MOS pipe is the N channel enhancement type MOS pipe of taking the parasitic diode, and the drain electrode of the N channel enhancement type MOS pipe of taking the parasitic diode is connected the inductance with between the unidirectional flux control element, the source electrode with the one end of first current sampling resistance is connected, the other end ground connection of first current sampling resistance, the grid pass through MOS pipe drive circuit with the singlechip is connected.
9. A boost-type resistance-regulating power supply circuit for use in an exercise apparatus as claimed in claim 1, wherein: the rectifying and filtering circuit comprises three rectifying bridge arms and a filtering capacitor which are connected in parallel, each rectifying bridge arm comprises two rectifying diodes which are connected in series in a forward direction, and a three-phase alternating current access end is connected between the two rectifying diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220182765.1U CN217335442U (en) | 2022-01-24 | 2022-01-24 | Boost type resistance-adjusting power supply circuit for fitness equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220182765.1U CN217335442U (en) | 2022-01-24 | 2022-01-24 | Boost type resistance-adjusting power supply circuit for fitness equipment |
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| Publication Number | Publication Date |
|---|---|
| CN217335442U true CN217335442U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220182765.1U Active CN217335442U (en) | 2022-01-24 | 2022-01-24 | Boost type resistance-adjusting power supply circuit for fitness equipment |
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| CN (1) | CN217335442U (en) |
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- 2022-01-24 CN CN202220182765.1U patent/CN217335442U/en active Active
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