CN107517026B - Synchronous rectification generator and protection method thereof - Google Patents
Synchronous rectification generator and protection method thereof Download PDFInfo
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- CN107517026B CN107517026B CN201610803925.9A CN201610803925A CN107517026B CN 107517026 B CN107517026 B CN 107517026B CN 201610803925 A CN201610803925 A CN 201610803925A CN 107517026 B CN107517026 B CN 107517026B
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 53
- 238000010248 power generation Methods 0.000 claims abstract description 17
- 230000002452 interceptive effect Effects 0.000 claims description 9
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- 238000002485 combustion reaction Methods 0.000 description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
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Abstract
The invention relates to a synchronous rectification generator and a protection method thereof. The synchronous rectification generator includes an alternator, a rectifier circuit, a regulator circuit, and a controller circuit. An alternator having a field coil and a power generation coil section converts mechanical energy into alternating current energy. The rectifier circuit converts ac power to dc power. The regulator circuit regulates the current of the field coil. The controller circuit controls a rectifying operation of the rectifier circuit and detects whether an abnormal event occurs in the rectifier circuit. When an abnormal event occurs in the rectifier circuit, the controller circuit causes the regulator circuit to reduce or stop supplying current to the field coil. When the abnormal event happens to the rectifier circuit, the circuit provided by the invention can immediately protect the rectifier circuit.
Description
Technical Field
The present invention relates to a generator circuit, and more particularly, to a synchronous rectification generator and a method for protecting a rectifier circuit.
Background
A conventional automotive alternator is composed of a rotor (rotor) coil and a stator (stator) coil. The rotor coils may provide a magnetic field to the stator coils when an excitation current is passed through the rotor coils. When an internal combustion engine of an automobile drives the rotor coil to rotate, the rotor coil can generate a rotating magnetic field, so that the stator coil generates alternating current electric energy. The rectifier receives the alternating current power from the alternating current generator, rectifies the alternating current power and generates direct current power. The direct current power can charge the storage battery. The battery can provide an excitation current to the rotor coil.
Generally, a large amount of current flowing through the rectifier increases the temperature of the rectifier. When the operating temperature of the rectifier is too high, the rectifier may be damaged due to the high temperature.
Disclosure of Invention
The invention provides a synchronous rectification generator and a protection method thereof, which can immediately protect a rectifier circuit when the rectifier circuit has an abnormal event so as to prevent the rectifier circuit from being damaged due to the occurrence of the abnormal event.
Embodiments of the present invention provide a synchronous rectified generator. The synchronous rectification generator includes an alternator, a rectifier circuit, a regulator circuit, and a controller circuit. The alternator has a field coil and a power generation coil portion for converting mechanical energy into alternating current energy. The rectifier circuit is electrically connected to the power generation coil portion. The rectifier circuit is used for converting alternating current electric energy into direct current electric energy. The regulator circuit is electrically connected to the rectifier circuit to detect the dc power. The regulator circuit is electrically connected to the field coil to adjust a current of the field coil. The controller circuit is electrically connected to the rectifier circuit and the regulator circuit for controlling the rectifying operation of the rectifier circuit and detecting whether an abnormal event occurs in the rectifier circuit. When an abnormal event occurs in the rectifier circuit, the controller circuit causes the regulator circuit to reduce or stop supplying current to the field coil.
The embodiment of the invention provides a protection method of a synchronous rectification generator. A synchronous rectified generator includes a rectifier circuit, a regulator circuit, a controller circuit, and a field coil. The protection method comprises the following steps: detecting whether an abnormal event occurs in the rectifier circuit; and when an abnormal event occurs in the rectifier circuit, the controller circuit causes the regulator circuit to reduce or stop supplying current to the field coils.
Based on the above, the embodiment of the invention provides a synchronous rectification generator and a protection method of a rectifier circuit. Upon the occurrence of an abnormal event in the rectifier circuit, the regulator circuit may adjust the current provided to the field coil accordingly (e.g., reduce the current of the field coil, or stop providing current to the field coil). Since the current of the field coil is reduced (even no current), the ac power of the power generation coil portion is also reduced (even zero), and thus the alternator can stop generating power. Therefore, when the abnormal event occurs in the rectifier circuit, the circuit provided by the embodiment of the invention can immediately protect the rectifier circuit.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a block diagram of a synchronous rectifier generator according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for protecting a synchronous rectifier generator in accordance with an embodiment of the present invention;
FIG. 3 is a schematic flow diagram illustrating a method for protecting a synchronous rectifier generator in accordance with another embodiment of the present invention;
FIG. 4 is a schematic flow chart diagram illustrating a method of protecting a synchronous rectifier generator in accordance with yet another embodiment of the present invention;
fig. 5 is a circuit diagram illustrating an exemplary circuit of the synchronous rectified generator of fig. 1 according to an embodiment of the present invention.
The reference numbers illustrate:
10: an Electronic Control Unit (ECU);
20: a storage battery;
100: a synchronous rectification generator;
110: a rectifier circuit;
111U: u intersects the stream end;
111V: v intersects the stream end;
111W: w intersects the stream end;
112 UU: a U-phase upper switch;
112 LU: a U-phase lower switch;
112 UV: a V-phase upper switch;
112 LV: a V-phase lower switch;
112 UW: a W-phase upper switch;
112 LW: a W-phase lower switch;
120: an alternator;
121: a field coil;
122: a power generation coil section;
122U: a U-phase coil;
122V: a V-phase coil;
122W: a W-phase coil;
123: a first common node;
130: a regulator circuit;
131: a switch;
132: a diode;
133: a regulator control circuit;
140: a controller circuit;
b +: a power terminal;
GND: a ground terminal;
LIN: a control end;
PS: a phase signal;
s230 to S250, S450, S510 to S560: and (5) carrying out the following steps.
Detailed Description
The term "coupled" as used throughout this specification, including the claims, may refer to any direct or indirect connection. For example, if a first device couples (or connects) to a second device, it should be construed that the first device may be directly connected to the second device or the first device may be indirectly connected to the second device through other devices or some means of connection. Further, wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. Elements/components/steps in different embodiments using the same reference numerals or using the same terms may be referred to one another in relation to the description.
Fig. 1 is a block diagram of a synchronous rectifier generator 100 according to an embodiment of the present invention. The synchronous rectification generator 100 can generate dc power under the Control of an Electronic Control Unit (ECU) 10. This dc power can be stored in the battery 20. The dc power generated by the synchronous rectifier generator 100 may also be used to power one or more load circuits (not shown), depending on design requirements. In the embodiment shown in fig. 1, the synchronous rectifier generator 100 includes a rectifier circuit 110, an alternator 120, a regulator circuit 130, and a controller circuit 140. The controller circuit 140 is electrically connected to the rectifier circuit 110 and the regulator circuit 130. The controller circuit 140 may control the rectifying operation of the rectifier circuit 110. In some application scenarios, regulator circuit 130 and controller circuit 140 may be referred to as a rotor controller and a stator controller, respectively.
Fig. 2 is a flow chart illustrating a method for protecting a synchronous rectification generator according to an embodiment of the present invention. Referring to fig. 1 and 2, the alternator 120 converts mechanical energy into ac power. The alternator 120 includes a field coil 121 and a power generating coil portion 122. When a current passes through the field coil 121, the field coil 121 may provide a magnetic field to the power generating coil part 122. One of the field coil 121 and the power generating coil portion 122 is a rotor coil, and the other of the field coil 121 and the power generating coil portion 122 is a stator coil. By way of example, but not limitation, the field coil 121 may be a rotor coil and the power generating coil portion 122 may be a stator coil. When the mechanical energy rotates one of the field coil 121 and the power generating coil part 122, the power generating coil part 122 may generate ac power to the rectifier circuit 110. Accordingly, the alternator 120 may convert the mechanical energy into alternating current energy. The rectifier circuit 110 is electrically connected to the power generating coil part 122. The rectifier circuit 110 converts the ac power from the power generation coil part 122 into dc power and supplies the dc power to the battery 20.
The regulator circuit 130 is electrically connected to the power generation coil portion 122 to detect the phase signal PS generated by the operation of the alternator 120. The regulator circuit 130 is electrically connected to the rectifier circuit 110 to detect the dc power. The regulator circuit 130 is electrically connected to the field coil 121. In step S230, the regulator circuit 130 may supply current to the field coil 121 using the direct current power of the secondary battery 20. In step S230, the regulator circuit 130 can adjust the current of the field coil 121 according to the phase signal PS and the dc power output by the rectifier circuit 110. The current of the field coil 121 may affect the ac power generated by the power generating coil part 122.
In an embodiment of the present invention, the rectifier circuit 110 will be detected whether an abnormal event occurs (step S240), which may include, for example, an over-temperature (over-temperature) event, an over-current (over-current) event, or an over-voltage (over-voltage) event. In step S250, when an abnormal event occurs in the rectifier circuit 110, the regulator circuit 130 adjusts the current of the field coil 121 correspondingly, for example, reduces the current of the field coil 121, or stops supplying the current to the field coil 121. The current of the field coil 121 is reduced or even no current, which can stop the alternator 120 from generating power, thereby preventing the rectifier circuit 110 from being damaged due to continuous operation after an abnormal event occurs.
Fig. 3 is a schematic flow chart illustrating a method for protecting a synchronous rectification generator according to another embodiment of the present invention. The steps S230 and S240 shown in fig. 3 can be analogized with the related description of the steps S230 and S240 shown in fig. 2, and thus are not described again. Referring to fig. 1 and fig. 3, the controller circuit 140 may detect whether an abnormal event occurs in the rectifier circuit 110 (step S240). When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 instantly notifies/controls the regulator circuit 130, causing the regulator circuit 130 to reduce or stop supplying current to the field coils 121. In the embodiment shown in fig. 1, the detection and notification of the occurrence of an abnormal event of the rectifier circuit 110 may be performed by, for example, the controller circuit 140, but is not limited thereto. In other embodiments, the detection and notification function of the abnormal event may be implemented in virtually any circuit architecture of the synchronous rectifier generator 100. For example, the abnormal event detecting and notifying function is configured at any circuit unit electrically connecting the rectifier circuit 110 and the regulator circuit 130 to notify the regulator circuit 130 to reduce or stop supplying the current to the field coil 121 when the abnormal event is detected at the rectifier circuit 110.
The manner in which the regulator circuit 130 stops supplying field coil current may be performed, for example, may include: the supply of current to the field coil 121 is stopped by turning off a switch (not shown) between the regulator circuit 130 and the field coil 121. In addition, the present invention further provides a technical solution for causing the regulator circuit 130 to reduce or stop supplying the current to the field coil 121 in a manner that the controller circuit 140 interferes with the phase signal PS generated by the operation of the alternator 120, which is described in detail as follows.
Referring to fig. 1 and 3, the controller circuit 140 may correspondingly determine whether to interfere the phase signal PS according to whether an abnormal event occurs in the rectifier circuit 110. When it is determined in step S240 that the abnormal event occurs in the rectifier circuit 110, the controller circuit 140 immediately proceeds to step S450. In step S450, the controller circuit 140 may momentarily interfere with the phase signal PS to cause the regulator circuit 130 to reduce or stop supplying current to the field coil 121. By way of example, but not limitation, the controller circuit 140 may pull down the phase signal PS to a certain preset range to cause the regulator circuit 130 to reduce or stop supplying current to the field coil 121.
Fig. 4 is a schematic flow chart illustrating a method for protecting a synchronous rectification generator according to another embodiment of the present invention. Referring to fig. 1 and 4, the controller circuit 140 is electrically connected to the rectifier circuit 110 and the regulator circuit 130. In step S510, the controller circuit 140 may control the rectifying operation of the rectifier circuit 110. In step S520, the controller circuit 140 may detect whether an abnormal event occurs in the rectifier circuit 110. The abnormal event may include, for example, an over-temperature (over-temperature) event, an over-current (over-current) event, or an over-voltage (over-voltage) event, depending on design requirements. Depending on whether the rectifier circuit 110 has an abnormal event, the controller circuit 140 may correspondingly determine whether to interfere with the phase signal PS in step S520.
When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 immediately interferes the phase signal PS (step S530). Because the phase signal PS is interfered (e.g., the phase signal PS is pulled low), the regulator circuit 130 reduces or stops supplying current to the field coil 121 accordingly (step S540). For example, when an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 may correspondingly pull down the voltage level of the phase signal PS to a preset range, so that the regulator circuit 130 stops (or reduces) supplying current to the field coil 121. The predetermined range may be determined according to design requirements. For example, the predetermined range may be "less than 1 volt" or "ground voltage level". The field coil 121 current may affect the ac power generated by the power generation coil portion 122. Therefore, the ac power transmitted to the rectifier circuit 110 by the power generation coil part 122 can be immediately reduced (or even reduced to zero) by interfering with the phase signal PS.
The controller circuit 140 may check again whether an abnormal event occurs in the rectifier circuit 110 in step S550. When the abnormal event is not resolved, the controller circuit 140 will go through steps S530, S540 and S550 again. When no abnormal event occurs in the rectifier circuit 110 (e.g., the temperature falls within the rated range), the controller circuit 140 does not interfere with the phase signal PS (step S560). Therefore, when an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 may immediately prevent damage of the rectifier circuit 110.
Fig. 5 is a circuit diagram illustrating an exemplary circuit of the synchronous rectified generator 100 of fig. 1 according to an embodiment of the present invention. The embodiment shown in fig. 5 can be used as an automotive alternator and its regulating circuit. As shown in fig. 5, the alternator 120 includes a rotor coil (e.g., a field coil 121) and a stator coil (e.g., a power generation coil portion 122). In the embodiment shown in fig. 5, power generation coil portion 122 includes U-phase coil 122U, V phase coil 122V and W-phase coil 122W. A first terminal and a second terminal of the U-phase coil 122U are electrically connected to the first common node 123 and the U-cross current terminal 111U of the rectifier circuit 110, respectively. A first terminal and a second terminal of the V-phase coil 122V are electrically connected to the first common node 123 and the V-cross current terminal 111V of the rectifier circuit 110, respectively. First and second ends of the W-phase coil 122W are electrically connected to the first common node 123 and the W-cross current end 111W of the rectifier circuit 110, respectively. When current passes through the field coil 121, and when an internal combustion engine (not shown) of the automobile rotates the field coil 121, the field coil 121 generates a rotating magnetic field. The U-phase coil 122U, V phase coil 122V and the W-phase coil 122W cut the magnetic lines of the rotating magnetic field, thereby generating three-phase ac power to the U-phase current terminal 111U, V and the W-phase current terminal 111W of the rectifier circuit 110.
The rectifier circuit 110 receives three-phase ac power from the alternator 120. The rectifier circuit 110 converts three-phase ac power from the power generating coil part 122 into dc power and supplies the dc power to the battery 20 through a first dc voltage output terminal (e.g., a ground terminal GND) and a second dc voltage output terminal (e.g., a power terminal B +). It should be noted that the battery 20 can also provide dc power to the regulator circuit 130 through the power terminal B + and the ground terminal GND.
In the embodiment shown in fig. 5, the rectifier circuit 110 includes a U-phase upper switch 112UU, a U-phase lower switch 112LU, a V-phase upper switch 112UV, a V-phase lower switch 112LV, a W-phase upper switch 112UW, and a W-phase lower switch 112 LW. The U-phase upper switch 112UU, the V-phase upper switch 112UV, and a first terminal of the W-phase upper switch 112UW are electrically connected to a second dc voltage output terminal (e.g., a power terminal B +) of the synchronous rectification generator 100 in common. First ends of the U-phase lower switch 112LU, the V-phase lower switch 112LV, and the W-phase lower switch 112LW are electrically connected to a first dc voltage output end (e.g., a ground end GND) of the synchronous rectification generator 100 in common. The U-phase upper switch 112UU and the second terminal of the U-phase lower switch 112LU are electrically connected to the U-phase current intersecting terminal 111U of the rectifier circuit 110 in common. The second terminals of the V-phase upper switch 112UV and the V-phase lower switch 112LV are electrically connected to the V-phase current terminal 111V of the rectifier circuit 110 in common. A second terminal of the W-phase upper switch 112UW and the W-phase lower switch 112LW are electrically connected in common to the W-phase current terminal 111W of the rectifier circuit 110. The controller circuit 140 may control the U-phase upper switch 112UU, the U-phase lower switch 112LU, the V-phase upper switch 112UV, the V-phase lower switch 112LV, the W-phase upper switch 112UW, and the W-phase lower switch 112LW to control the rectifying operation of the rectifier circuit 110.
In the embodiment shown in fig. 5, regulator circuit 130 includes a switch 131, a diode 132, and a regulator control circuit 133. A first terminal of the switch 131 is electrically connected to the first direct-current voltage output terminal (e.g., the ground terminal GND) of the synchronous rectification generator 100, and a second terminal of the switch 131 is electrically connected to a first terminal of the field coil 121. An anode of the diode 132 is connected to the first terminal of the field coil 121 and the second terminal of the switch 131, and a cathode of the diode 132 is electrically connected to the second terminal of the field coil 121. The regulator control circuit 133 is electrically connected to a first dc voltage output terminal (e.g., the ground terminal GND) and a second dc voltage output terminal (e.g., the power terminal B +) of the synchronous rectification generator 100 to detect a voltage level of the dc power output by the synchronous rectification generator 100. The regulator control circuit 133 is also electrically connected to the power generation coil section 122 to detect the phase signal PS. The phase signal PS may be derived from any one of the U-phase coil, the V-phase coil, and the W-phase coil of the stator coil, for example. According to the phase signal PS and the voltage level of the dc power output by the synchronous rectification generator 100 (e.g., the voltage level of the power terminal B +), the regulator control circuit 133 can correspondingly control the on state of the switch 131. The on state of the switch 131 determines the amount of current passing through the field coil 121, thereby adjusting the ac power generated by the power generating coil part 122. Furthermore, the regulator control circuit 133 may also receive a control command of the electronic control unit 10 via the control terminal LIN of the synchronous rectification generator 100. The regulator control circuit 133 may generate corresponding dc power according to the control of the electronic control unit 10. The implementation details of the regulator control circuit 133 may be determined according to design requirements. For example, in some embodiments, an existing regulator control circuit or other control circuit may be used to implement the regulator control circuit 133, and thus the details of the operation of the regulator control circuit 133 are not described in detail.
In addition, the controller circuit 140 may detect whether an abnormal event occurs in the rectifier circuit 110. For example, but not limited to, one or more temperature sensors (not shown) may be disposed near one or more of the U-phase upper switch 112UU, the U-phase lower switch 112LU, the V-phase upper switch 112UV, the V-phase lower switch 112LV, the W-phase upper switch 112UW, and the W-phase lower switch 112LW, according to design requirements. Implementation details of the one or more temperature sensors (not shown) may be determined according to design requirements. For example, in some embodiments, existing temperature sensors or other temperature sensors may be employed to implement the one or more temperature sensors (not shown), and thus are not described in detail. The controller circuit 140 may detect, via the one or more temperature sensors (not shown), whether an over-temperature event (an abnormal event) occurs in one or more of the U-phase upper switch 112UU, the U-phase lower switch 112LU, the V-phase upper switch 112UV, the V-phase lower switch 112LV, the W-phase upper switch 112UW, and the W-phase lower switch 112 LW.
In other embodiments, one or more current sensors (not shown) may be disposed in the current path of one or more of U-phase upper switch 112UU, U-phase lower switch 112LU, V-phase upper switch 112UV, V-phase lower switch 112LV, W-phase upper switch 112UW, and W-phase lower switch 112 LW. Implementation details of the one or more current sensors (not shown) may be determined according to design requirements. For example, in some embodiments, existing current sensors or other current sensors may be employed to implement the one or more current sensors (not shown), and thus are not described in detail. The controller circuit 140 may detect whether an overcurrent event (abnormal event) occurs in one or more of the U-phase upper switch 112UU, the U-phase lower switch 112LU, the V-phase upper switch 112UV, the V-phase lower switch 112LV, the W-phase upper switch 112UW, and the W-phase lower switch 112LW via the one or more current sensors (not shown).
In one embodiment, controller circuit 140 is electrically connected to regulator circuit 130. When no abnormal event occurs in the rectifier circuit 110, the controller circuit 140 does not perform any abnormal notification action. Thus, the regulator control circuit 133 operates normally. When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 may notify the regulator circuit 130 to cause the regulator control circuit 133 to control the switch 131 to reduce or stop supplying the current to the field coil 121, so that the ac power transmitted to the rectifier circuit 110 by the power generation coil portion 122 can be instantaneously reduced (or even zero).
In another embodiment, the controller circuit 140 may, for example, momentarily interfere with the phase signal PS upon detecting an abnormal event of the rectifier circuit 110. For example, but not limited to, the power generating coil part 122 may include a first terminal outputting the phase signal PS, the regulator circuit 130 includes a second terminal receiving the phase signal PS, and the controller circuit 140 may be electrically connected to the first terminal or the second terminal, or to any node between the first terminal and the second terminal, so as to interfere with the phase signal PS when the abnormal event occurs in the rectifier circuit 110. When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 may pull down the phase signal PS to a predetermined range by setting a resistor (not shown). The predetermined range may be determined according to design requirements. For example, the predetermined range may be "less than 1 volt" or "ground voltage level". When the voltage level of the phase signal PS falls within the preset range, the regulator control circuit 133 stops supplying the current to the field coil 121 by turning off the switch 131. Since the regulator circuit 130 stops supplying the current to the field coil 121, the ac power transmitted to the rectifier circuit 110 by the power generation coil part 122 can be instantaneously reduced (even to zero). Therefore, when an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 may immediately prevent damage of the rectifier circuit 110.
The mechanism for the controller circuit 140 to return from "interfering phase signal PS" to "non-interfering phase signal PS" can be implemented in several ways according to design requirements. For ease of explanation, it will be assumed herein that the abnormal event of the rectifier circuit 110 includes an over-temperature event. Other methods for handling the abnormal event can be analogized by referring to the related description of the over-temperature event, and thus are not described in detail.
For example, in some embodiments, when the temperature of the rectifier circuit 110 is between the first threshold temperature and the second threshold temperature (e.g., between 180 degrees celsius and 200 degrees celsius), the controller circuit 140 correspondingly pulls down and holds the phase signal PS within a certain predetermined range for a predetermined period (e.g., pulls down and holds the phase signal PS to the ground voltage level for 5 seconds), so that the regulator circuit 130 stops supplying the current to the field coil 121 during the predetermined period (e.g., within 5 seconds). After the predetermined period ends, the controller circuit 140 can stop interfering the phase signal PS, so that the regulator circuit 130 can resume normal operation.
In other embodiments, when the temperature of the rectifier circuit 110 is greater than the first threshold temperature and the second threshold temperature (e.g., greater than 215 degrees celsius and a plus-minus error of 30 degrees), the controller circuit 140 may permanently keep the phase signal PS within the predetermined range (e.g., at the ground voltage level).
In still other embodiments, when the temperature of the rectifier circuit 110 is between the first threshold temperature and the second threshold temperature, the controller circuit 140 correspondingly pulls down the phase signal PS to a predetermined range and keeps the phase signal PS for a predetermined period. After the predetermined period ends, the controller circuit 140 can stop interfering the phase signal PS, so that the regulator circuit 130 can resume normal operation. In the case where the factor causing the abnormal event is not eliminated, after the regulator circuit 130 resumes the normal operation, the temperature of the rectifier circuit 110 is likely to rise abnormally again, thereby causing the controller circuit 140 to interfere with the phase signal PS again. The controller circuit 140 may count the number of times the controller circuit 140 interferes with the phase signal PS. When the number of times of interference is greater than a certain threshold number, the controller circuit 140 may permanently keep the phase signal PS within a predetermined range (e.g., at the ground voltage level). The critical number may be determined according to design requirements, for example, the critical number is set to 10.
The embodiment shown in fig. 5 is an example of the operation of a three-phase alternator. The present invention is also applicable to other types of automotive alternators, such as six-phase alternators or other polyphase alternators of three or more phases, depending on design requirements.
It is noted that, in various application scenarios, the relevant functions of regulator control circuit 133 and/or controller circuit 140 may be implemented as software or hardware using a general hardware description language (e.g., verilog hdl or VHDL) or other suitable programming language. The software that can perform the related functions may be arranged as any known computer-accessible media such as magnetic tape (magnetic tapes), semiconductor (semiconductors) memory, magnetic disk (magnetic disks) or optical disk (compact disks such as CD-ROM or DVD-ROM), or may be transmitted via the Internet (Internet), wired communication (wireless communication), wireless communication (wireless communication) or other communication media. The software may be stored in an accessible medium of a computer. In addition, the apparatus and method of the present invention may be implemented by a combination of hardware and software.
In summary, the synchronous rectification generator 100 and the protection method thereof according to the embodiments of the present invention can detect whether an abnormal event occurs in the rectifier circuit 110. Upon the occurrence of an abnormal event in the rectifier circuit 110, the controller circuit 140 may cause the regulator circuit 130 to adjust the current of the field coil 121 in response thereto (e.g., decrease the current of the field coil 121, or stop providing current to the field coil 121). Since the current of the field coil 121 is reduced (even without current), the ac power of the power generating coil part 122 is also reduced (even to zero). Therefore, when an abnormal event occurs in the rectifier circuit 110, the circuit provided by the embodiment of the invention can immediately protect the rectifier circuit 110.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A synchronous rectified generator, comprising:
an alternator having a field coil and a generating coil portion for converting mechanical energy into alternating current energy;
a rectifier circuit electrically connected to the power generation coil part for converting the ac power into dc power;
a regulator circuit electrically connected to the rectifier circuit to detect the direct current power and electrically connected to the field coil to adjust a current of the field coil; and
a controller circuit electrically connected to the rectifier circuit and the regulator circuit to control a rectifying operation of the rectifier circuit and detect whether an abnormal event occurs in the rectifier circuit, wherein the controller circuit causes the regulator circuit to reduce or stop supplying current to the field coil when the abnormal event occurs in the rectifier circuit,
wherein the abnormal event is an over-temperature event comprising:
when the temperature of the rectifier circuit is between a first critical temperature and a second critical temperature, the controller circuit correspondingly keeps a phase signal generated when the synchronous rectification generator operates within a preset range for a preset period, so that the regulator circuit reduces or stops supplying current to the field coil in the preset period, and after the preset period is finished, the controller circuit stops interfering with the phase signal.
2. The synchronous rectified generator of claim 1, wherein the synchronous rectified generator is a multiphase alternator.
3. The synchronous rectified generator of claim 1, wherein when the over-temperature event occurs in the rectifier circuit, the controller circuit causes the regulator circuit to stop supplying current to the field coil by turning off a switch between the regulator circuit and the field coil.
4. The synchronous rectified generator of claim 1, wherein:
the field coil is a rotor coil, the power generation coil part comprises a plurality of stator coils, wherein the phase signal is from any phase of the plurality of stator coils, and the power generation coil part comprises a first end for outputting the phase signal;
the regulator circuit is electrically connected to the power generating coil part to detect the phase signal, wherein the regulator circuit includes a second end receiving the phase signal, and the regulator circuit adjusts the current supplied to the field coil according to the phase signal and the DC power; and
the controller circuit is electrically connected to the first terminal or the second terminal, or any node between the first terminal and the second terminal, so as to interfere with the phase signal when the over-temperature event occurs in the rectifier circuit.
5. The synchronous rectification generator of claim 4, wherein the controller circuit has a resistor between the controller circuit and the first terminal or the second terminal or any node, and the controller circuit correspondingly pulls down the voltage level of the phase signal to the predetermined range when the over-temperature event occurs in the rectifier circuit.
6. The synchronous rectified generator of claim 1, wherein:
the controller circuit permanently maintains the phase signal within the predetermined range when the temperature of the rectifier circuit is greater than the first threshold temperature and the second threshold temperature.
7. A method of protecting a synchronous rectified generator, the synchronous rectified generator comprising a rectifier circuit, a regulator circuit, a controller circuit, and a field coil, the method comprising:
detecting whether an abnormal event occurs in the rectifier circuit; and
the controller circuit causes the regulator circuit to reduce or stop supplying current to the field coil when the abnormal event occurs in the rectifier circuit,
wherein the abnormal event is an over-temperature event, and the interference of the phase signal generated by the operation of the synchronous rectifier generator by the controller circuit upon the occurrence of the over-temperature event comprises:
when the temperature of the rectifier circuit is between a first critical temperature and a second critical temperature, the controller circuit correspondingly maintains the phase signal in a preset range for a preset period, so that the regulator circuit reduces or stops supplying current to the field coil during the preset period, and
after the preset period is finished, the controller circuit stops interfering the phase signal.
8. The method of claim 7, wherein the regulator circuit detects the phase signal to correspondingly adjust the current supplied to the field coil as a function of the phase signal, wherein the step of causing the regulator circuit to reduce or stop supplying current to the field coil comprises:
the controller circuit correspondingly determines whether to interfere the phase signal according to whether the over-temperature event occurs in the rectifier circuit; and
when the over-temperature event occurs in the rectifier circuit, the controller circuit pulls the phase signal down to the preset range to cause the regulator circuit to reduce or stop supplying current to the field coil.
9. The method of claim 7, wherein the step of interfering the phase signals further comprises:
when the temperature of the rectifier circuit is greater than the first critical temperature and the second critical temperature, the phase signal is permanently kept in the preset range.
10. The method of claim 7, wherein the step of interfering the phase signals further comprises:
counting the number of times the controller circuit interferes with the phase signal; and
when the interference times are larger than the critical times, the phase signal is permanently kept in the preset range.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105118669A TWI604684B (en) | 2016-06-15 | 2016-06-15 | Synchronous rectifier alternator and protection method thereof |
| TW105118669 | 2016-06-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107517026A CN107517026A (en) | 2017-12-26 |
| CN107517026B true CN107517026B (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610803925.9A Expired - Fee Related CN107517026B (en) | 2016-06-15 | 2016-09-06 | Synchronous rectification generator and protection method thereof |
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| CN (1) | CN107517026B (en) |
| TW (1) | TWI604684B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI674746B (en) * | 2018-05-17 | 2019-10-11 | 朋程科技股份有限公司 | Synchronous rectifier alternator and power allocation method thereof |
| CN111092479B (en) * | 2019-11-20 | 2021-04-30 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Control method of rectifier generator |
| TWI722895B (en) * | 2020-05-08 | 2021-03-21 | 國立虎尾科技大學 | Three-phase synchronous rectification control system of generator |
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| DE102013207135A1 (en) * | 2013-04-19 | 2014-10-23 | Bayerische Motoren Werke Aktiengesellschaft | Start-up of the excitation current of a multiphase AC generator connected to an electrical system of a motor vehicle when activating the generator |
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- 2016-06-15 TW TW105118669A patent/TWI604684B/en not_active IP Right Cessation
- 2016-09-06 CN CN201610803925.9A patent/CN107517026B/en not_active Expired - Fee Related
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| US8129957B2 (en) * | 2008-03-19 | 2012-03-06 | Denso International America, Inc. | Alternator voltage regulator with maximum output limiting function |
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| DE102013207135A1 (en) * | 2013-04-19 | 2014-10-23 | Bayerische Motoren Werke Aktiengesellschaft | Start-up of the excitation current of a multiphase AC generator connected to an electrical system of a motor vehicle when activating the generator |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI604684B (en) | 2017-11-01 |
| TW201743546A (en) | 2017-12-16 |
| CN107517026A (en) | 2017-12-26 |
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