CA2240414A1 - Isolated electrical power supply - Google Patents

Isolated electrical power supply

Info

Publication number
CA2240414A1
CA2240414A1 CA 2240414 CA2240414A CA2240414A1 CA 2240414 A1 CA2240414 A1 CA 2240414A1 CA 2240414 CA2240414 CA 2240414 CA 2240414 A CA2240414 A CA 2240414A CA 2240414 A1 CA2240414 A1 CA 2240414A1
Authority
CA
Canada
Prior art keywords
lead
transformer
earth ground
tied
primary
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.)
Granted
Application number
CA 2240414
Other languages
French (fr)
Other versions
CA2240414C (en
Inventor
Curt S. Carlson
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.)
Individual
Original Assignee
Individual
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
Priority claimed from US08/571,331 external-priority patent/US5689180A/en
Application filed by Individual filed Critical Individual
Publication of CA2240414A1 publication Critical patent/CA2240414A1/en
Application granted granted Critical
Publication of CA2240414C publication Critical patent/CA2240414C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

An isolated power supply for protecting electrical devices from transient voltages and currents is disclosed. Specifically, the filter has a toroid (110) and resistor (102) which are used in conjunction with an isolator transformer (30). The transformer's secondary windings (124) are coupled to the electrical load (12) sought to be isolated. The primary windings (122) of the transformer are tied to an alternating current source (14) with an earth ground lead (18). The primary shield lead (138) of the transformer is tied to the earth ground lead. The secondary shield lead (134) of the transformer is also tied to the earth ground. A toroid inductor and resistor in parallel are coupled between the secondary neutral lead (68) and the secondary ground lead (70) to shunt off current or voltage spikes. The earth ground is part of a chassis which prevents spark jump insuring the isolation of the power source.
The isolator thus provides equal voltage potential between the secondary lead and the primary earth ground at frequencies of less than 1 kHz.
CA 2240414 1995-12-13 1996-12-10 Isolated electrical power supply Expired - Fee Related CA2240414C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/571,331 1995-12-13
US08/571,331 US5689180A (en) 1995-12-13 1995-12-13 Isolated electrical power supply
PCT/US1996/020025 WO1997022168A1 (en) 1995-12-13 1996-12-10 Isolated electrical power supply

Publications (2)

Publication Number Publication Date
CA2240414A1 true CA2240414A1 (en) 1997-06-19
CA2240414C CA2240414C (en) 2007-01-23

Family

ID=29406136

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2240414 Expired - Fee Related CA2240414C (en) 1995-12-13 1996-12-10 Isolated electrical power supply

Country Status (1)

Country Link
CA (1) CA2240414C (en)

Also Published As

Publication number Publication date
CA2240414C (en) 2007-01-23

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Legal Events

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Effective date: 20131210