GB1114648A - A driving circuit improvement for ultrasonic generators utilizing static switching devices - Google Patents

A driving circuit improvement for ultrasonic generators utilizing static switching devices

Info

Publication number
GB1114648A
GB1114648A GB5063466A GB5063466A GB1114648A GB 1114648 A GB1114648 A GB 1114648A GB 5063466 A GB5063466 A GB 5063466A GB 5063466 A GB5063466 A GB 5063466A GB 1114648 A GB1114648 A GB 1114648A
Authority
GB
United Kingdom
Prior art keywords
capacitor
thyristor
power
gate
auxiliary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5063466A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1114648A publication Critical patent/GB1114648A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • B06B1/0223—Driving circuits for generating signals continuous in time
    • B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
    • B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal
    • B06B1/0253—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken directly from the generator circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
    • H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

1,114,648. Pulse generators. WESTING- HOUSE ELECTRIC CORPORATION. 11 Nov., 1966 [17 Dec., 1965], No. 50634/66. Heading H3T. [Also in Divisions G4 and H2] A pulse generator for an ultrasonic vibrating transducer 2 comprises a power thyristor 4 driven by an auxiliary thyristor 26 which is shunted across the anode-gate electrodes of the power transistor 4; this, together with an impedance 34 from gate to cathode, turns off the firing pulse rapidly and prevents excessive heat dissipation in the gate-cathode path of the power thyristor. When the supply is connected, capacitor 8 charges up through a constantcurrent choke 6, and the transducer 2, and at a certain point the capacitor voltage is sufficient to fire the auxiliary thyristor 26 through resistor 16 and diode 22. This turns on the power thyristor 4 and capacitor 8 discharges through it and inductor 10. The components 8 and 10 form a resonant circuit and capacitor 8 then charges in a reverse direction cutting off the power thyristor 4. The capacitor 8 now discharges in the reverse direction through the load 2 and the cycle recommences. Capacitor 14 affects the phase of the oscillating voltage and stabilizes the frequency. The firing point of the auxiliary thyristor 26 is controlled by two feedback paths: (a) from the anode of thyristor 4 through resistor 12; and (b) from capacitor 14 through an integrating circuit 16, 18, capacitor 20 improving the rise time of the integrated signal. The operating frequency depends on the ratio of these feedback signals. Diode 22 protects the thyristor 26 from high negative voltages when the capacitor 8 is reverse charged, and diodes 30, 32 short-circuit the gate electrodes of the thyristors for the same reason.
GB5063466A 1965-12-17 1966-11-11 A driving circuit improvement for ultrasonic generators utilizing static switching devices Expired GB1114648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51447365A 1965-12-17 1965-12-17

Publications (1)

Publication Number Publication Date
GB1114648A true GB1114648A (en) 1968-05-22

Family

ID=24047315

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5063466A Expired GB1114648A (en) 1965-12-17 1966-11-11 A driving circuit improvement for ultrasonic generators utilizing static switching devices

Country Status (2)

Country Link
FR (1) FR1505746A (en)
GB (1) GB1114648A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467640A1 (en) * 1979-10-17 1981-04-30 G Sojuzny Z Mek Increasing object mobility in solid medium - by electromagnetic pulsed excitation of cross-sectionally synchronised elastic surface deformations

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075617A1 (en) * 1981-09-24 1983-04-06 Dentan Kabushiki Kaisha Ultrasonic distance measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467640A1 (en) * 1979-10-17 1981-04-30 G Sojuzny Z Mek Increasing object mobility in solid medium - by electromagnetic pulsed excitation of cross-sectionally synchronised elastic surface deformations

Also Published As

Publication number Publication date
FR1505746A (en) 1967-12-15

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