Free Digital Playground Pirates

Schema A cruise control PWM

Schema A cruise control PWM
The following two comparators and two gates NAND Schmitt trigger, is the pulse generator itself: the values of RC networks used determine a working frequency of about 5-6 kHz. The duty cycle changes according to the voltage on pin 13, according to the description above.



When the voltage varies, the operating frequency also changes slightly. The transistors T1 and T2 operate as drivers of small power and the signal output directly controls the trigger (gate) of N-channel power MOSFET, a RFG70N06 (see Figure 7b). This device can operate at 60 V with a maximum current of 70 A: which is more than adequate for our needs.
Feeding speed control is assigned to an integrated circuit regulator 12 V in series with a resistance of power fact "fall" much of the difference between 36 and 12 V.
The complete circuit, with power MOSFETs and the motor is activated by a relay: we used a double contact 24 V 10 A each.
in series with the coil of relay we have planned, apart from a dropping resistor (Compensating the voltage difference), a key start and a general push normally closed (NC). The latter is attached to the brake lever to stop the engine when you brake. Not only is the braking will be more efficient but it will not harm the engine or the PWM controller through actions contrary.






component list
regulator R1 = R2 = 1 kΩ
47 kilohm
trimmer R3 = 10 kilohms
R4 R5 = 33 kΩ = 270 kΩ

R6 = 1 MΩ
trimmer R7 R8 = 330 kΩ = 2.2 MΩ

R9 = 2 2 k = 39 kΩ
R10 = 100 kΩ
R11 R12 = 470 kΩ

R13 R14 = 100 kΩ
= 5, 6 kΩ = 390 kΩ
R15 R16 = 100 kΩ

R17 R18 = 100 kΩ = 4.7 kΩ

kΩ R19 = 33 R20 = 10 Ω

R21 = 470 Ω 2 W R22 = 330 Ω
2 W
P1 = 2.2 kΩ pot. flax.
C1 = 100 nF multilayer
C2 = 10 uF 16 V electrolytic
C3 = 22 nF polyester
C4 = 47 nF polyester
C5 = 470 uF 16 V electrolytic

C6 = 100 nF multilayer
C7 = 100 nF multilayer
C8 = 1000 pF ceramic
C9 = 470 uF 63 V electrolytic
D1 = 1N4148 Diode 1N4148 Diode
D2 = D3 = Diode
BYW80-200
T1 = BC547B NPN
T2 = BC557B PNP Integrated
U1 = U2 = LM339
Integrated
4093 Regulator U3 = 7812 =
MSFT1 RFG75N06
MOSFET relay RL1 = 24V 2 10 A RT
CH1 = Inter. Key
P1 Pusher NF
= M = Motor 180 W 36 V DC

Miscellaneous:
2 Brackets 2 x 7-pin TO220
1 Radiator
an isolation kit for TO3P
an isolation kit for TO220
1 Bar of Aluminum (radiator) 4
FASTON Terminals for it
1 terminal 1 Terminal 2 poles 3 poles