JPS5549902A - Method of controlling separately-excited dynamic braking of electric vehicle - Google Patents

Method of controlling separately-excited dynamic braking of electric vehicle

Info

Publication number
JPS5549902A
JPS5549902A JP12221778A JP12221778A JPS5549902A JP S5549902 A JPS5549902 A JP S5549902A JP 12221778 A JP12221778 A JP 12221778A JP 12221778 A JP12221778 A JP 12221778A JP S5549902 A JPS5549902 A JP S5549902A
Authority
JP
Japan
Prior art keywords
current
cam shaft
braking force
reduced
armature
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.)
Pending
Application number
JP12221778A
Other languages
Japanese (ja)
Inventor
Shigeru Koyama
Miyoshi Maki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12221778A priority Critical patent/JPS5549902A/en
Publication of JPS5549902A publication Critical patent/JPS5549902A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/003—Dynamic electric braking by short circuiting the motor

Abstract

PURPOSE: To reduce the fluctuation width of braking torque and the number of steps, by weakening an instructed braking force by the prescribed ratio when a cam shaft is in a position between the steps.
CONSTITUTION: When the speed of a vehicle is reduced in accordance with an instruction from an instruction pattern circuit 11 and the current IF of a separately- excited field winding 3 is increased, the current IA of an armature falls gradually. When the current of the armature reaches a limit point, a field detector 9 generates a signal to operate a cam shaft controller 10 to short-circuit a resistance section of a main resistor and advances a cam shaft to a step. The current of the armature is then going to increase again. However, the intermediate location of the cam shaft between a first and a second step is detected by an auxiliary cam switch so that a braking force istruction value to a braking force comparison amplifier 13 is reduced at a prescribed ratio to an instructed brake by a braking force pattern change circuit 12 and then applied to the brake. As a result, the notching peak current is suppressed and the fluctuation width of the braking torque is reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP12221778A 1978-10-03 1978-10-03 Method of controlling separately-excited dynamic braking of electric vehicle Pending JPS5549902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12221778A JPS5549902A (en) 1978-10-03 1978-10-03 Method of controlling separately-excited dynamic braking of electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12221778A JPS5549902A (en) 1978-10-03 1978-10-03 Method of controlling separately-excited dynamic braking of electric vehicle

Publications (1)

Publication Number Publication Date
JPS5549902A true JPS5549902A (en) 1980-04-11

Family

ID=14830441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12221778A Pending JPS5549902A (en) 1978-10-03 1978-10-03 Method of controlling separately-excited dynamic braking of electric vehicle

Country Status (1)

Country Link
JP (1) JPS5549902A (en)

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