JPS61202104U

JPS61202104U -

Info

Publication number: JPS61202104U
Application number: JP8407185U
Authority: JP
Priority date: 1985-06-04
Filing date: 1985-06-04
Publication date: 1986-12-18

Description

[Brief explanation of drawings]

第１図乃至第４図は本考案に係る直流直巻モー
タの発電制動回路の一実施例を示し、第１図は停
止状態、第２図は前進状態、第３図は後進状態、
第４図は発電制動状態を夫々示す。第５図は従来
の直流直巻モータの駆動回路例を示す回路図であ
る。８……直流直巻モータの発電制動回路〔駆動回
路〕、９……第１の直列回路、１０ａ……電機子
コイル、１０ｂ……界磁コイル、１１……直流電
源〔車載バツテリ〕、１２……第２の直列回路、
１３……速度制御用可変抵抗回路、１４……切換
スイツチ回路、１５……切換スイツチ制御回路、
１８……発電制動用スイツチ回路、１８ａ……サ
イリスタ、１９……制動条件判定回路、１９ａ…
…第１のＡＮＤゲート、１９ｂ……アクセル強制
ＯＦＦ回路、１９ｃ……第２のＡＮＤゲート、ａ
……下り勾配センサ出力、ｂ……ブレーキＯＮ出
力、ｃ……アクセルＯＦＦ出力、ｄ……制動条件
判定出力。 1 to 4 show an embodiment of a dynamic braking circuit for a DC series motor according to the present invention, in which FIG. 1 is in a stopped state, FIG. 2 is in a forward state, FIG. 3 is in a reverse state,
FIG. 4 shows the respective dynamic braking states. FIG. 5 is a circuit diagram showing an example of a drive circuit for a conventional DC series motor. 8... DC series motor dynamic braking circuit [drive circuit], 9... First series circuit, 10a... Armature coil, 10b... Field coil, 11... DC power source [vehicle battery], 12 ...Second series circuit,
13... Variable resistance circuit for speed control, 14... Changeover switch circuit, 15... Changeover switch control circuit,
18...Switch circuit for dynamic braking, 18a...Thyristor, 19...Braking condition determination circuit, 19a...
...First AND gate, 19b...Accelerator forced OFF circuit, 19c...Second AND gate, a
... Downhill slope sensor output, b ... Brake ON output, c ... Accelerator OFF output, d ... Braking condition judgment output.

Claims

[Scope of utility model registration request]

a first series circuit in which a field coil of a DC series motor and a DC power supply are connected in series; a second series circuit in which an armature coil of the motor and a variable resistance circuit for speed control are connected in series; Both ends of the second series circuit are connected in the forward direction by operating the speed control means when moving forward, and in the opposite direction by operating the speed control means when moving backward, and when the speed control means is not operated. A changeover switch circuit connects a second series circuit to one end of the field coil with both ends short-circuited, and connects the other end of the field coil to a predetermined position within the speed control variable resistance circuit during dynamic braking. When the connected dynamic braking switch circuit and the brake ON output are generated, the accelerator mechanism is forcibly turned OFF, and when the downward slope sensor output, brake ON output, and accelerator OFF output are generated together, the dynamic braking switch is 1. A dynamic braking circuit for an electric vehicle, comprising a braking condition determination circuit that makes the circuit conductive.