![]() 230000000875 corresponding Effects 0.000 abstract description 4.238000005070 sampling Methods 0.000 claims abstract description 30.Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Assigned to ASAHI KASEI TOKO POWER DEVICE CORPORATION reassignment ASAHI KASEI TOKO POWER DEVICE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). ![]() Application granted granted Critical Publication of US5499176A publication Critical patent/US5499176A/en Assigned to TOKO, INC. 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 Toko America Inc filed Critical Toko America Inc Priority to US08/105,390 priority Critical patent/US5499176A/en Assigned to TOKO AMERICA, INC. Original Assignee Toko America Inc 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 or warranty as to the accuracy of the list.) Erisman Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US08/105,390 Inventor Brian P. ![]() Google Patents Pulse transformer circuit for isolating electrical signalsĭownload PDF Info Publication number US5499176A US5499176A US08/105,390 US10539093A US5499176A US 5499176 A US5499176 A US 5499176A US 10539093 A US10539093 A US 10539093A US 5499176 A US5499176 A US 5499176A Authority US United States Prior art keywords pulse transformer signal voltage pulse transformer Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5499176A - Pulse transformer circuit for isolating electrical signals The addition of a scaling pot will provide for proportional follower operation.US5499176A - Pulse transformer circuit for isolating electrical signals By simply connecting the input terminals across the armature leads of a “master motor”, you can use the VSI2 for master/follower operation. The wide input range allows the VSI2 to follow signals as low as +0-5V logic levels and up to the 180VDC levels present at the armature leads of a 180VDC motor. The output of the VSI2 is a filtered, pulse width modulated signal that is directly proportional to the input speed signal. The Dart VSI2 can be used with virtually any motor speed control that has a speed reference circuit of +5 to +15VDC and an input impedance greater than 47K ohms. An electrical isolation rating of 2500Vrms is achieved by the use of an optically isolated IC package. The VSI2 is packaged in an aluminum chassis mount housing and contains an on-board power supply for its logic circuit. A single model accepts a wide range of input voltages (0-5 through 0-25VDC or 0-25 through 0-250VDC) AND 4-20mA. The VSI2 incorporates Dart’s unique feedback circuit, which virtually eliminates output changes due to the thermal drift of logic components. The Dart VSI2 (speed signal isolator) permits the user to control the output of a variable speed motor drive from any external grounded or ungrounded DC input signal. VSI2 – Signal Follower Option NEW – Jumper Selectable DC volts or 4-20mA Operation
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