Permanent Magnet Alternator shunt voltage regulator simulations

3 years ago 3072
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Simulations of simple shunt voltage regulator circuits to regulate the rectified output of a permanent magnet alternator such as may be found on many motorcycles.

Several variations of the basic circuit are possible.

Please note, however, that not all variants are illustrated in this project:

  1. Using a bipolar power transistor as the shunt regulator element. Suitable for low power alternators up to about 100W / 8.3A output.

  2. Using a MOSFET power transistor as the shunt regulator element. Suitable for medium power alternators up to about 300W / 25A.

  3. An extendable version based on (2), using a paralleled array of MOSFET power transistors as the shunt regulator elements. Suitable for higher power alternators up to about 3kW / 250A.

  4. Simply by reducing the zener diode to a 6.2V part, design version (1) is particularly suited to regulating lower voltage outputs such as the 6V DC outputs of some smaller motor cycles and scooters.

  5. By reducing the zener diode to a 4.7V part, connecting the regulator across the +/- outputs of a suitably rated (and heat sunk) bridge rectifier and then connecting the alternator output across the AC terminals of the bridge rectifier, design version (1) is also well suited to regulating lower AC voltages such as the 6V AC outputs of some trail bikes.

  6. Similarly, by changing the zener diode to a 6.2V part, and using a lower threshold voltage MOSFET, design version (2) is also well suited to regulating lower voltage outputs such as the 6V outputs of some trail bikes.

  7. Similarly, by changing the zener diode to a 4.7V part, using a lower threshold voltage MOSFET; connecting the regulator across the +/- outputs of a suitably rated (and heat sunk) bridge rectifier and then connecting the alternator output across the AC terminals of the bridge rectifier, design version (2) is also well suited to regulating lower AC voltages such as the 6V AC outputs of some trail bikes.

Some of the designs simulated here have been built into a number of bikes and run successfully for many years however, because the power devices in these regulators operate in shunt circuits, i.e. directly across the rectified alternator output at all times and therefore dissipate very high powers - up to the maximum power output of the alternator: they even work if the battery itself is disconnected - it is essential that these power devices be mounted on adequate heatsinking.

Whilst such heatsinking may have the benefit of airflow over it when the bike is moving, bear in mind that there may be times when the engine is spinning at high rpm - so the alternator output will be around the maximum - but the bike itself may be virtually stationary.

This is particularly true on trail bikes, which may be climbing steep inclines in low gear or stuck in mud.

Always mount such devices as far as possible out of the way of water and mud splashing onto them and ensure that the enclosures are fully watertight.

Remember that these devices will be subject to severe vibration, some mechanical shock and a pretty wild temperature range so they should be built using good quality components and assembly techniques such as using strain relief loops and cable restraints in the wiring.

Note that in these simulatons:

  1. the alternator is very crudely modelled as a set of low resistance 3-phase voltage sources. This is adequate for the purposes of these simulations but does not fully represent the operation of a real permanent magnet alternator;

  2. the battery is also very crudely modelled simply as a very large capacitor with a small series resistance. (Schematic 1a shows a way to start the simulation off with a fully charged battery.)

Documents

1. Permanent Magnet Alternator 12V DC regulator (power BJT)

2. Permanent Magnet Alternator 12V DC regulator (power MOSFET)

3. Permanent Magnet Alternator 12V DC regulator (power MOSFET for higher power outputs)

5. Permanent Magnet Alternator 6V AC regulator (power BJT)

6. Permanent Magnet Alternator 6V DC regulator (power MOSFET)

1a. Permanent Magnet Alternator 12V DC regulator (power BJT) with initially fully charged battery

BOM

ID Name Designator Footprint Quantity
1 SINE(0 {Vpk*1.414/sqrt(3)} 100 0 0 0) V1 2P-5.0 1
2 SINE(0 {Vpk*1.414/sqrt(3)} 100 0 0 120) V2 2P-5.0 1
3 SINE(0 {Vpk*1.414/sqrt(3)} 100 0 0 240) V3 2P-5.0 1
4 STTH30L06W D1,D2,D3,D4,D5,D6 DO35-7 6
5 100 RBASE1 R3 1
6 1G R2,R1 R3 2
7 10m R1,R3,R4,REMITTER1,R_BATTERY,R2,RDRAIN1,RDRAIN2,RDRAINN R3 9
8 BZX84_C13 D7 SOD123 1
9 2N3906 Q1 SOT23 1
10 MJ11032 Q2 SOT23 1
11 V=V(PH1)*V(RAMP) B1 NONE 1
12 V=V(PH2)*V(RAMP) B2 NONE 1
13 V=V(PH3)*V(RAMP) B3 NONE 1
14 PULSE(0 1 0 10m) V4 2P-5.0 1
15 10 RLOAD,RGATE2,RGATE3,RGATEN R3 4
16 1Meg RBASE2,RGATE1 R3 2
17 1 C_BATTERY 1206 1
18 IRFB3077PBF M1,M2,MN NONE 3
19 10k RGATE1,REMITTER1 R3 2
20 1N4148 D8 DO35-7 1
21 2DC2412R Q2 SOT23 1
22 1k RGATE1 R3 1
23 BZX84_C6V8 D7 SOD123 1
24 STP36NF06L M1 NONE 1

Attachments

None
Success
The owner does not allow comments in this project now

Comments (3)

Marcelotronic Reply

Como você está?Tudo ok?Estou tentando simular e também passar seus projetos para o PCB, mas não estou conseguindo, porque este dando erro, poderia verificar o que está acontecendo?
Eu sou um novo usuário na EASYEDA.

Marcelotronic Reply

prefixo de componentes duplicados

andyfierman Reply

@Marcelotronic,


Todos os esquemas de um projeto são passados para um PCB.


É por isso que você recebe o erro "Prefixo duplicado".


Estes são esquemas de simulação. Para convertê-los em PCB, você precisa:


1. Copie o esquema de simulação que você deseja converter em PCB em um novo projeto.


2. Retire todas as partes da simulação e adicione coisas como conectores que não estejam no esquema de simulação.


3. Adicione todas as informações do BoM (fornecedor\, número de peça do fornecedor\, fabricante\, número de peça do fabricante\, descrição etc.) a cada componente (adicione-o à primeira instância única e copie e cole essa peça para todas as outras instâncias da mesma peça ).


Para mais detalhes sobre isso, por favor leia:


https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f


All schematics in a project are passed into one PCB.


That is why you get the "Duplicate prefix" error.


These are simulation schematics. To convert them to PCB you need to:


1. Copy the simulation schematic you want to convert to PCB into a new project.


2. Strip out all the simulation only parts and add things like connectors that are not in the simulation schematic.


3. Add all the BoM information (supplier\, supplier part number\, manufacturer\, manufacturer part number\, description etc.) to each component (add it to the first unique instance then copy and paste that part for all the other instances of the same part).


For more detail on this, please read:


https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f

goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.