Regulator for dynamo

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Regulator for dynamo

As you may recall from last month's article on the function of generators in your classic carthere is no means of internally controlling the output of one. In other words, the faster it spins the more voltage goes into the car's electrical system. If this weren't controlled the generator would damage the battery and burn out the car's lights.

Also, if the generator weren't cut out from the car's circuitry when not running, the battery would discharge through its case. Regulators have seen many design improvements over the decades, but the most commonly used electro-mechanical regulator is the three-control units in one box type.

Let's look at how these things work Sometimes called the circuit breaker, this device is a magnetic "make-and-break" switch. It connects the generator to the battery and therefore the rest of the car circuit when the generator's voltage builds up to the desired value.

It disconnects the generator when it slows down or stops. The relay has an iron core that is magnetized to pull down a hinged armature. When the armature is pulled down a set of contact points closes and the circuit is completed. When the magnetic field is broken like when the generator slows down or stops a spring pulls the armature up, breaking the contact points. An obvious failure mode is the contact points.

As they open and close, a slight spark is generated, eventually eroding the material on the points until they either "weld" themselves together or become so high in resistance that they won't conduct current when closed. In the first case the battery would discharge through the generator overnight and in the second there would be no charging to the system. Another iron core-operated set of contact points is utilized to regulate maximum and minimum voltage at all times.

This circuit also has a shunt circuit a shunt re-directs electrical flow going to ground through a resistor and placed just ahead electrically of the points.

When the points are closed the field circuit takes the "easy" route to ground but when the points are open the field circuit must pass through the resistor to get to ground.

The field coil on the generator is connected to one of the voltage regulator contact points. The other point leads directly to ground.

When the generator is operating battery low or a number of devices running its voltage may stay below that for which the control is set.Skip to main content. Filter by vehicle:. Filter Results. Enable JavaScript to use the part finder, or see our list of vehicles. In"Dodge Ram" was rebranded as "Ram". To add Ram trucks for and beyond: 1. Select the vehicle year. Select Ram in the Make menu. Your Garage 0. You have no vehicles in your garage. To add a new vehicle, select the year, make, and model at left.

regulator for dynamo

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FREE Shipping on eligible orders. Voltage Regulator. Only 12 left in stock - order soon. Only 2 left in stock - order soon. Only 15 left in stock - order soon. Only 13 left in stock - order soon.

Previous Page 1 2 Free Shipping by Amazon. Standard Motor Products. DB Electrical. EMS Global Direct.Watch this space for updates!!! Well, it's affecting everyone. Individuals and businesses alike. Specialists in dynamo rebuilding, modification and repair. The original and still the best. W e lead the way. Suppliers to the enthusiast and the trade alike. We always have a very high volume of work but aim to turn all jobs around as quick as possible without compromising on quality.

Our products and services are VSCC approved. Have your work carried out by the company that owns, drives, rides and shares your passion for old vehicles.

Our next event is the. Plot AJ What's new at a glance? Great news! Front fog and driving light bulbs are now in the headlamp bulb section of the shop - Part number 7. Retro fit hazard warning light kit part number 8. Better to buy direct from us and than at highly inflated prices from re-sellers.

There is lots to read as you click through. The biggest problem with any old vehicle is its antiquated electrical system. Ask most owners and they'll tell you the same story. Dim lights? Bulbs keep blowing? Bad starting? Sticking cutout?

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Ignition light glowing? Dynamo won't charge? Dynamo over charging? Battery always low?

Dynamo Current and Voltage Regulator

All our work is guaranteed.All the products we have developed were made initially for our own cars! They were designed to be durable and easy to use. We certainly did not want to have to do the job over again! They offer excellent service and have been doing electronic conversions of a variety of regulators for a long time. The ADR series of voltage regulators are designed to be durable and efficient.

Automobile Electrical Systems — Part 3: How Voltage Regulators Work

They have the lowest heat production of any regulator on the market. This is very important because the ambient temperature in the engine compartment can get quite high, and the heat produced by the regulator itself has nowhere to go, and the temperature of the parts in the regulator can rise much higher yet.

This document discusses one particular aspect of regulator design. We also have a small supply of original Lucas RB housings that can be been converted as a drop-in replacement option. If you have a different type of regulator, we probably can convert it too! Please contact us with your specific needs. We also offer these regulators in compact aluminum housings which can fit a wide variety of applications. These electronic solid-state regulators are compatible with all Lucas-type generators dynamos which use "B", "grounded field", or "P" type regulators.

They have current limits ranging from 5 amps to 25 amps. Positive and Negative ground versions are now available.

Regulators with reversed field output "A", "live field" or "N" type to suit Bosch and American generators. When I got my TR7 init didn't run very well. I switched the carburetors to the UK-spec SU carbs, but it was still running lean.

I traced it down to the carburetor mounts. To help satisfy US emissions regulations in the 's, British Leyland devised flexible rubberized mounts for the attachment of the carburetors to the engine. Unfortunately, even with normal loads the rubber in these mountssoon splits and allows air to enter the intake manifold causing lean running conditions. This lean mixture can be very damaging to the engine and should not be allowed to persist.

This solid mounting adapter that includes a standard insulator spacer and reproduces the original mounting dimensions.

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It is important to maintain these dimensions because the throttle linkage depends on this geometry. During high power testing we found that the spring fuse holders for AGC type fuses get quite hot. Therefore we have developed a new fuse block which has studs for the fuse terminals and which produces considerably less heat. For high current applications this will improve overall reliability, especially the reliability of the fuse. AGC fuses run at high current will tend to overheat and have degraded lifetime due to thermal cycling.

The fuse blocks are compatible with the full range of fuse ratings to over amps. We also carry fuses in the ratings used in our regulators. We have brand new high-quality Lucas-style regulator bases and lids. We have both the 5-post regulator bases with screw terminals and "Lucar" quick-connect terminals. We also will have 9-post screw-terminal bases.

This means we will be able to supply brand new drop-in replacement regulators in 5 post and 9 post applications.When you have tested the charging system of a car fitted with an alternatorand the checks in How to test a car battery point to a fault in the voltage regulatormake sure that you need to replace it. The fault may be elsewhere. If the simple tests described here do not work, take the car to an auto-electrician; alternators fitted to modern cars are easily damaged.

Before doing any work on an alternator system other than testing, disconnect both terminals of the battery. Incorrect charging or no output may be due to a badly earthed regulator. Make sure that the connections are clean and tight.

The unit may be earthed through its mountings or by a separate lead. Undercharging may be caused by faulty alternator brushes and slip rings See Renewing alternator brushesas well as by a faulty regulator. A simple way to check the alternator is to start the engine and connect a voltmeter across the battery terminals.

If it registers battery voltage only, the fault is in the alternator or its wiring, or in a field isolating relay if fitted. If it registers an excessive charge 15 volts or more the regulator is faulty and you should replace it. With the battery disconnected, remove the rear cover of the alternator. On most cars you must take the alternator off to reach it See Testing an alternator and checking output.

Unfasten the leads there are two, three or four and a metal connecting tag - noting where they fit. The regulator may be fixed by two screws, or by one screw and locating slots: note how these slots fit so that you can install the new unit correctly. Take care not to drop any screws or washers. The link protects the alternator from the battery when the ignition is switched off. You may need to slacken the link screw and move the link aside.

Note the small plastic spacer. The new unit may not be identical in all its respects to the old one - for example, it may have more or fewer connecting wires. Follow the maker's instructions carefully; they will tell you how to connect the unit to various types of alternators. Reassemble the alternator, reconnect the battery, start the engine and test See How to test a car battery.

regulator for dynamo

Replacing a separate regulator outside the alternator is straighforward, whether it is a modern transistor type or one of the electromagnetic kind fitted to some imported cars. With the battery disconnected take the connections off the regulator.

regulator for dynamo

Label the leads to avoid confusing them. Remove the fixing screws and take off the regulator. Clean the area behind it to ensure a good contact if the regulator is earthed through its mountings. Fit the new unit, reconnect the leads, and then the battery. Start the engine and test the regulator. Although the trend is towards designing the electronic regulator into the alternator, some are still separate. An older car may have a dynamo instead of an alternator.

A dynamo has a separate regulator, the control box See Cleaning and replacing a control boxwhich has three electromagnetic switches for controlling the currentthe voltage and for cutting out when necessary, to prevent the battery from discharging through the dynamo. Some alternators have separate electromagnetic regulators, and some have a separate field isolating relay, an electromagnetic switch which protects the alternator when the ignition is switched off.

Some cars have a separate control in the circuit for the warning light on the instrument panel. The Video Course teaches you everything about modern cars. The Lucas ACR alternator, like many alternators fitted to British cars, has the voltage regulator mounted inside.

This is possible because the modern voltage regulator is a sold-state device.Dynamo Lighting Links. The purpose is to switch to rechargeable batteries when the generator is idle. In addition, the device limits the voltage across the bulbs when the generator operates at a high speed. As you can see, the circuit is purely electrical. In the presented design, the switch has been moved, compared to the original to a location where the switch better functions under different circumstances.

I kept the regulator on the bike for 2 years during which the circuit operated fairly satisfactorily. Thereafter, I moved on to an electronic regulator optimized for the operation with a hub dynamo.

When the main switch is in the on position, and the generator is not running, the bulbs are fed by five reachargeable batteries. A running generator feeds the relay, which switches the bulbs to the generator in place of the batteries.

Excess voltage across the generator is used to recharge the batteries. The Zener diodes are for protection. The batteries can be further recharged through the charger jack. I have used a 7. As is seen, the circuit, generator, and lights share the ground.

regulator for dynamo

All unmarked diodes are 1A Schottky. D1 is some generic all-purpose 1A diode. Since many relay manufacturers start their lineup with such relays, you might be able to get one from elsewhere. The relay's line of action goes horizontally across the figure. Different connections and colors are for my own reference. I have used mAh nicads from Radio Shack, which I soldered in series. Currently, higher-capacity NiMHs are available. I mounted the regulator box on my wire basket. Using reflector holders, it could be mounted on the frame.

I have used a FER generator and lights with a halogen bulb in the front and with a regular bulb in the back. The regulator ensures that motorists see me at an intersection while I'm standing. The device genuinly gives me more security and the drivers respect me more.

We do not have any hills here, so I cannot assess the operation for a steep climb. A possibility is to include a trimmer resistor in series with the relay for adjustments.

The schematic shown above is the most conservative, letting the generator to take over whenever there is a slightest sign of life from that generator. As the system performed reliably, I decided, eventually, to tip the balance more towards the batteries. Thus, I reduced the capacitor value from uF to 75uF the capacitor affects the delay in the reaction of the regulator and I put a resistor of ohm in series with the relay the resistor affects the threshold at which the generator takes over.

The particular values would, generally, depend on the relay and on the taste, and should be experimented with. In my case, the batteries now take over when the light driven by a generator dims significantly. Without the diodes, you will fry the delicate relay poles in no time. Capacitors are useless for the purpose.

Finding a right charging adapter turned out to be quite tricky. I tried a number of them using the generous Radio Shack return policy and buying individual adapters from different outlets. Do not count on the different relay poles to fire simultaneously. Solar cells can deliver a respectable charging current in bright sun. However, the current becomes abysmal under cloudy winter skies.The only exception is with a Schmidt headlight, as these already contain a robust regulator.

Any light with an LED standlight function will also have a suitable regulator. The exception is any light with an LED standlight function, which already has a suitable regulator.

Fitting is straight forward with the instructions supplied. A regulator should always be fitted if there is an existing problem of bulbs burning out. A factory-fitted regulator can fail, especially with a modern hub generator.

US336962A - Regulator For Dynamo—Electric Machines - Google Patents

The regulator should be connected across the circuit, as shown in the schematic circuit diagram, opposite. If temporary dimming occurs usually within 2 minutes it indicates that LED protection detected over-voltage, and an external voltage regulator must be added. Nicelite bulbs will return to normal operation without damage when the voltage reduces to 6V or less, and once regulation is in place they will work continuously. Dimensions approx. Cable supports 8mm each side.

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XGEN5 Body 37mm x 6mm dia. Cable is flexible PVC insulated multi-core copper.

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Cable supports are semi-flexible. These systems normally have at least one internal regulator. Systems that were originally supplied with a krypton or vacuum bulb usually do not have an internal regulator. Krypton and Vacuum bulbs can be identified by rounded glass. Halogen bulbs have a distinct small point on the end of the glass. In the case of hub generators switched at the headlight, it is preferable to fit the XGEN5 to the wire or wires leading to the tail light if fitted.

Please open the Fitting Instructions for further information. Two cable ties. Four Lucas brass bullets and 2 bullet connectors. XGEN2 Regulator with fitted terminals on both wires.


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