What is the difference between two speed and single speed DC drills?

Direct current. The difference between single speed and double speed is as follows:

1. The speed is different. When the switch is turned on at a single speed, it will continue to work at a stable speed, and the speed cannot be adjusted. The two-speed electric rotation has two gears, and you can choose the right gear according to different use occasions. Low speed and low power in the low gear. The high-grade speed is high and the power is high.

2. The internal structure is different. The two-speed motor is equipped with a motor speed control module and a speed control switch, which is not available in the ordinary single-speed electric rotation.

How a single-speed motor works:

An electric motor converts electrical energy into mechanical energy.

A piece of equipment. It is utilized by an energized stator.

The winding generates a rotating magnetic field and acts on the rotor squirrel cage closed aluminum frame to form a magnetoelectric dynamic rotational torque.

The stator magnetic field speed of the motor is not synchronized with the rotor rotation speed. The motor is mainly composed of a stator and a rotor, and the direction of the energized wire's movement in the magnetic field is related to the direction of the current and the direction of the magnetic field. The working principle of the motor is the effect of the magnetic field on the current force, which makes the motor rotate.

The motor speed is fixed.

Two-speed motor. It belongs to an asynchronous motor.

Pole change speed regulation is to change the number of pole pairs of the stator rotating magnetic field by changing the connection method of the stator winding.

Thus changing the speed of the motor.

Variable speed principle. The speed of the motor is changed by changing the connection of the windings, that is, changing the speed of the motor by changing the number of pole pairs of the motor's rotating magnetic field.

Two-speed motor (fan), usually low speed, sometimes the fan at high speed, mainly through the following external control line switching to change the winding connection of the motor coil to achieve.

1. Two common windings with different pole pairs are embedded in the stator slot, and the number of pole pairs can be changed by changing the connection method of the stator winding of the motor through the switching of the external control circuit.

2. Two independent windings with different pole pairs are embedded in the stator slot.

3. There are two independent windings with different pole pairs embedded in the stator slot, and each winding can have different connections.

The difference is in the rotational speed, such as drilling with a small drill bit, the rotational speed difference is doubled. The two-speed is fast and slow, and the single speed is incomparable because it only has a fast gear.

The torque is high at low speed and low at high speed.

The variable speed switch principle of DC electric drill: the side of the switch slider is provided with a front bump, the switch slider is connected with a speed regulating knob, the speed regulating knob is connected with the limiting rod by threading, the limiting lever is provided with the rear bump on the same side as the front bump, and the front bump and the rear bump fall in the chute that is provided on the shell.

Described switch base is provided with the speed regulating resistor sheet of thyristor two poles, and the speed regulating resistor plate is in contact with a horse riding card connected to the switch slider; This type of drill switch can adjust both the speed and the maximum rated speed.

1. The difference between two-speed and single-speed DC electric drill is as follows:

Two-speed refers to the motor power is the so-called high and low speed, suitable for tapping fast backwards, in fact, there is not much difference between single speed and double speed, if you carefully compare the tachometer, you will find that the lowest speed is only 10 revolutions, with a large load of power The motor can not rotate, or to open that, the two-speed motor is about 200 more expensive than the single-speed motor I can't remember the specifics. There is a strong hole in the iron, and the single speed is incomparable, because it only has a fast gear, of course, there is a difference, and the double speed is the fast and slow gear.

2. The differences between DC electric drills and AC electric drills are as follows:

AC electric drill is generally the use of mains 220V, there must be a power supply and the use of **wire has to pull to**, the use is not too convenient, DC is mainly rechargeable, the use of lithium battery as the power supply, easy to use, when there is no electricity, it can also be used, but the charging trouble, as well as the use of external DC power supply, this is not as good as the use of alternating current, which is better to use according to the specific situation to see the convenience of use.

The single speed of the rechargeable hand drill is that there is only one speed that cannot be adjusted, and the double speed is the speed that can be adjusted, one high-speed and one low-speed.

The working principle of the electric drill is that the motor rotor of the electromagnetic rotary or electromagnetic reciprocating small-capacity motor does the magnetic field cutting and does the work, and drives the operating device through the transmission mechanism to drive the gear to increase the power of the drill bit, so that the drill bit scrapes the surface of the object and better penetrates the object.

The main specifications are mm, etc., and the number refers to the maximum diameter of the drill bit drilled in steel with a tensile strength of 390n mm2. The maximum drilling diameter of non-ferrous metals, plastics and other materials can be 30 50% larger than the original specifications.

Nowadays, rechargeable hand drills have many clock specifications, and the lithium batteries used also have many different voltages. Hand drills are equipped with chargers, different brands of flashlights according to the manufacturer's design requirements, respectively, there are 30 minutes of fast charging, 40 minutes of fast charging, 45 minutes of fast charging, there are also 1 hour of standard charging, hours of standard charging and more than 2 hours of slow charging. Rechargeable hand drills are not often used like mobile phones, this tool needs to work when it is at work, so now rechargeable hand drills use fast charging, especially 30 minutes - 1 hour at most.

It's just that you don't provide the brand, model, battery capacity and other parameters of the hand drill, which can't provide you with an accurate charging time. But this doesn't matter much, because the charger of the rechargeable hand drill has an indicator of whether the battery is charged or not, you can check the hand drill manual, and then determine the charging time of your hand drill according to the indicator light on the hand drill charger. The hand drill charger is shown in the figure below, and the charging indicator is at the position indicated by the yellow arrow in the figure.

The rechargeable hand drill uses a rechargeable lithium-ion battery, and the rechargeable lithium-ion battery is convenient to work with the electric drill when charging, although fast charging can be used, but this charging method is slightly damaging to the battery. In order to make the battery life of the rechargeable hand drill longer, it is recommended to use the principle of full discharge of the battery during the first three uses. In future use, if the electric drill is not in a hurry to use it after it is fully charged, it is recommended to charge it for about 10 minutes before using it again, so that the lithium battery can be fully charged.

There are several differences between the dual electric and single electric electric of the electric drill:

2.The battery life is different: the battery life of dual electric drills is generally longer than that of single electric drills, because when one battery is exhausted, the other battery can immediately take over the work.

3.Different weights: Double drills are usually heavier and wider than single drills, because the weight of two batteries will increase the weight of the whole drill.

4.**Different: Dual drills are usually higher than single drills because they have better power and battery life.

In short, double electric drills are more suitable for jobs that require continuous and high-intensity use, while single electric drills are suitable for small, simple work.

First of all, the main difference between single and double electric drills is in terms of operating power. A single electric drill has a small power output and can be used for finer tasks, such as drilling small holes; The double electric drill has a large power output, which can be applied to larger tasks, such as adding screws or making nails and screws. In addition, the motor model of the dual electric drill is larger, more powerful, more efficient, and less noisy. In addition, because the double electric drill is more flexible, it can be more convenient in different working occasions, such as outdoor use, you can use its electric trouser to block the pool pure power supply.

Of course, there is a difference, the two-speed is fast and slow, and the single-speed is incomparable because it only has a fast gear, I hope it can help you.

The single speed of the rechargeable hand drill is that there is only one speed that cannot be adjusted, and the two speeds can be adjusted, one high-speed and one low-speed.

An electric drill is a drilling machine that uses electricity as a power tool. It is a conventional product in power tools, and it is also the most demanded power tool products. The annual production and sales volume accounts for 35% of China's power tools.

The main specifications of the electric drill are mm, etc., and the number refers to the maximum diameter of the drill bit drilled in the steel with a tensile strength of 390N mm2. The maximum drilling diameter of non-ferrous metals, plastics and other materials can be 30 50% larger than the original specifications.

The working principle of the electric drill is that the motor rotor of the electromagnetic rotary or electromagnetic double-type small-capacity motor to the yard shed does the magnetic field cutting and does the work, and the operating device is driven by the transmission mechanism to drive the gear to increase the power of the drill bit, so that the drill bit scrapes the surface of the object and better penetrates the object.