Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
  • G01R31/34—Testing dynamo-electric machines
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/30—Structural association with control circuits or drive circuits
  • H02K11/35—Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis

Definitions

• the present invention relates to a rotating electric machine monitoring device that continuously monitors, for example, stresses, temperatures, torques, and the like of respective portions of a rotating portion of the rotating electric machine.
• Fig. 1 is a configuration diagram of a conventional rotating electric machine monitoring device shown in, for example, the Tateyama Electronic Catalog (June 1991), the Japan Philips Catalog (1989), etc.
• An induction power supply that supplies AC power
• a rectifier that converts the obtained AC power into DC power ( 4 ) is a transmitter of an FM telemeter operated by the power from the rectifier ( 3 ), ( 5 ) is a transmitting and receiving antenna of the FM telemeter, ( 6 ) is a demodulator, (Is a sensor for monitoring the rotating part of the rotating electric machine, for example, a thermocouple, a strain gauge, or the like is used.
• the induction power supply (1) converts AC power from commercial frequency to high frequency.
• the rotary transformer supplies the AC high frequency from the stationary part to the rotating part in a non-contact manner.
• the converter ( 3 ) converts the AC high frequency into DC and supplies power to the F-telemeter transmitter ( 4 ).
• the power supply from the rectifier ( 3 ) activates the transmitter ( 4 ) of the F-meter.
• the signal to be monitored is picked up by a sensor) and transmitted and received through a transmitter ( 4 ).
• a signal is transmitted from the rotating part to the stationary part in a non-contact manner.
• the FM radio wave from the transmission / reception antenna (5) is demodulated by a demodulator ( 6 ) into an analog signal which is raised up by a sensor.
• the power supply structure requires a rotation tiger down scan (2) is complicated in order to supply to the FM telemeter transmitter (4), also There was a problem in that the installation space was increased in the rotating transformer (), the physique became large, and the installation time was long.
• the monitoring device for a rotating electric machine is configured such that an induction coil is wound around a rotating portion of the rotating electric machine, and the power generated in the induction coil is rectified by a rectifier and supplied to a transmitter of an FM telemeter. Things.
• the induction power supply device and the rotating transformer in the conventional device are not required, the structure is simplified, and the installation space for the rotating transformer is not required, and the size can be reduced. Therefore, it is possible to obtain a great advantage in practical use, such as an inexpensive device and improved maintainability.
• FIG. 1 is a block diagram showing the configuration of a conventional rotating electrical machine monitoring device
• FIG. 2 is a block diagram showing the configuration of the rotating electrical machine monitoring device of the present invention
• FIGS. Specific examples Fig. 3 is an overall outline drawing
• Fig. 4 is a sectional view taken along line A-A of Fig. 3
• Fig. 5 is an explanatory diagram showing the arrangement of induction coils
• Fig. 6 is fixing each part. It is explanatory drawing which shows an example of a state.
• FIG. 2 is a block diagram showing the configuration of the device according to the present invention
• FIGS. 3 to 6 are structural diagrams showing specific examples of one embodiment of the present invention.
• ⁇ is the rotor of the monitored rotating electrical machine, and]] is the armature coil mounted in this rotor (the slot (10a) formed with the WH).
• an induction coil (S) is installed between the upper coil and the lower coil of the armature coil (U), and AC power is generated in the induction coil ( 8 ) during operation.
• ⁇ Is an electric coil.
• s is an induction coil ( 8 ) placed between the coils of the armature coil 3 ⁇ 4.
• the installed sensor is a rectifier ( 3 ) and an FM telemeter oscillator
• ⁇ is a band for fixing the connection wiring between the induction coil ( 8 ) and the rectifier ( 3 ) and the connection wiring between the sensor (7) and the oscillator (to the rotor (.).
• the ( 7 ) measures the temperature of the coil end of the armature coil (11), for example, and is fixed to the coil end by a band or the like. Next, the operation will be described.
• the AC power generated in the induction coil is rectified by the rectifier ( 3 ) and supplied to the oscillator of the F-telemeter ( 4 ).
• the oscillator () is activated by the power supply from the rectifier ( 3 ), and the measurement signal of the coil end temperature obtained by the sensor ( 7 )
• the signal is converted to an FM frequency signal and transmitted from the transmitting antenna (5a) on the rotating part of the antenna ( 5 ) to the receiving antenna (5b) on the fixed part.
• the FM frequency signal received by the receiving antenna (5b) is demodulated into an analog signal by the demodulator ( 6 ).
• the analog signal output from the demodulator ( 6 ) is input to a monitoring device (not shown) and compared with the set value. If the set value is exceeded, it is judged that the temperature of the coil end of the armature coil ( ⁇ ) is abnormal, for example. Then, an alarm is issued by a buzzer, lamp, etc. to monitor the condition of the rotating part of the rotating electrical machine.
• the induction coil (8) Since the FM telemeter operates with a low-voltage, low-output power supply, the induction coil (8) usually requires only one or two turns.
• the sensor is the temperature sensor
• torque measurement may be performed as a sensor) including a strain gauge.
• the sensor may be a piezoelectric element, and may be a sensor according to the object to be monitored by the rotating unit, and the same effect as in the above embodiment can be obtained.
• an induction coil is wound around a rotating part of a rotating electric machine, and power generated in the induction coil is regulated by a rectifier and supplied to a transmitter of an FM telemeter. This has the effect of simplifying and reducing the structure.
• the present invention is applicable to an apparatus for continuously monitoring stress, temperature, torque, and the like of a rotating portion of a rotating electric machine.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Selective Calling Equipment (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=13790667

Family Applications (1)

Country Status (3)

Citations (3)

• 1985
  • 1985-05-30 JP JP1985083024U patent/JPS61199167U/ja active Pending
• 1986
  • 1986-05-30 WO PCT/JP1986/000274 patent/WO1986007212A1/ja not_active Ceased
  • 1986-05-30 DE DE19863690264 patent/DE3690264T1/de not_active Withdrawn

Patent Citations (3)

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