Common lighting terminology

First, the luminous flux:

In a unit of time, the light source radiates into the surrounding space to make the light of the human eye produce light (understand: the light that can make the human eye produce the visible light, so I think it can also be roughly understood as the visible light radiated by the light source to the surrounding space. energy).

When a monochromatic light source having a yellow-green wavelength of 555 nm is emitted, if the radiation power is 1 W, it emits a luminous flux of 680 lm. Thus, the luminous flux of a light source of a certain wavelength can be calculated as follows:

Φλ=680V (λ) Pλ

Where: Φλ—the luminous flux (lm) of the light source with a wavelength of λ; Pλ—the radiation power (W) of the light source with a wavelength of λ; V(λ)—the relative spectral light efficiency of the wavelength of λ light.

The luminous flux of the multi-color source is the sum of the monochromatic luminous fluxes.

Second, the luminous intensity:

The luminous flux of a light source radiating within a solid angle in a particular direction. Referred to as light intensity, symbol I, the unit is candela (cd).

Solid angle: the angle formed by a certain area A on the sphere on the center of the sphere is called the solid angle, expressed as ω, and

ω = A / r2, the unit of solid angle is Sr (sphericality). When A=r2, ω=1Sr, so the solid angle corresponding to the entire spherical surface is ω=4Пr2/r2=4П(Sr).

Therefore, there are: Iθ=Φ/ω Iθ—the light intensity (cd) of the light source in the θ direction; Φ—the luminous flux (lm) received by the spherical surface A; the corresponding solid angle (Sr) of the spherical surface. 1cd=1lm/1Sr

Third, the illumination:

The luminous flux received per unit area of ​​the illuminated object is called the illuminance of the illuminated surface, and the symbol is E, and the unit is lx. Illuminance can be expressed as:


Where: E - illuminance on the illuminated surface (lx); Φ - A received light flux (lm); A - the area of ​​the received luminous flux.

When the diameter of the light source is less than 1/5 of its distance to the illuminated surface, the light source can be considered as a point source. The surface illuminance E is proportional to the light intensity Iθ of the point source in this direction, and inversely proportional to the square of the distance r from the source, called the inverse square inverse law.

When the light is obliquely incident, the illuminance of the illuminated surface is proportional to the light intensity Iθ of the light source in this direction and the cosine of the incident angle θ, and inversely proportional to the square of its distance from the light source.

Fourth, the light output:

The luminous flux emitted by a surface light source per unit area to a half space is called the light exiting degree of the light source, and the sign is M, and the unit is lm/m2. Its calculation formula is: M=Φ/S, where S is the area of ​​the surface light source ( M2).

The light emission degree of the secondary light-emitting surface that is reflected and emitted is M=ρE where ρ is the reflection coefficient of the illuminated surface. The light emission degree of the secondary light-emitting surface that emits light due to transmission is M = τE where τ is the transmission coefficient of the illuminated surface.

Five, brightness:

The luminous intensity of the illuminant in the line-of-sight direction projection area is referred to as the surface luminance of the illuminant, and is represented by the symbol L in units of cd/m2.

Lθ=Iθ/Acosθ, where Lθ is the luminance of the illuminant along the surface (cd/m2), Iθ—the luminous intensity of the illuminant along the direction (cd); Acos θ—the projection surface of the illuminant in the line of sight direction.

Sixth, brightness contrast C:

Ratio of target brightness to background brightness in field of view

Seven, the general color rendering index Ra:

The general color rendering index for daylight and artificial standard light sources close to daylight is set at 100. For the same object, the color developed under the illumination of the measured light source is more consistent with the color developed by the light of the standard light source, and the larger Ra, the better the color rendering performance; conversely, the poorer the color rendering property.

Eight, color temperature:

The color of a light source expressed by a different color emitted by a black body heated to a different temperature is called the color temperature of the light source, and the color temperature is expressed in units of absolute temperature scale K. The correlated color temperature is the radiant temperature at which the chromaticity of the light is closest to or at the minimum of the chromaticity of the complete radiator (black body) at a certain temperature.

Dc Gear Motor, namely Gear Reduction Motor, is based on ordinary Dc Motor , coupled with gear reduction gearbox.

The gear reducer is used to provide low speed and large torque.

At the same time, the gearbox with different deceleration ratio can provide different speed and torque.

Generally different industries, using different power dc motor, generally adopt custom parameter design pattern.

What are the four ratings of the Dc Gear Motor? The DC gear motor is often seen in our industrial production. Here Shunchang Motor gives you the knowledge of its four ratings. To talk about

1. Rated Current: The rated current is the maximum current allowed to flow through the armature winding of the DC deceleration motor in accordance with the specified operating mode, in A.

2. Rated Voltage: The rated voltage is the maximum additional voltage that the armature winding of the motor can work safely, unit V. It

3. Rated Speed: Rated speed refers to the rotational speed of the Gear Reducer Motor  in the rated voltage, rated current and output rated power under the circumstances of operation, the unit is r/min. Such

4, rated power: rated power refers to the motor in accordance with the specified mode of operation can provide output power. For motor, rated power is the output of mechanical power on the shaft.

Gear Motor

precision instruments and meters,automobile industry, medical equipment, consumer electronics, household appliances, electric glass doors and Windows,etc., wide application range

gear motor

Features: gear motor drive precision, small volume, large torque, low noise, durability, low energy consumption, customized power design,easy installation, easy maintenance;Simplify design and save space.

Method of use: the best stable in horizontal plane, installed on the dc gear motor output shaft parts, cannot use a hammer to knock,knock prone to press into the dc gear motor drive, may cause damage to internal components, and cannot be used in the case of blocked.

dc gear motor

Operating temperature range:

Geared motors should be used at a temperature of -10~60℃.

The figures stated in the catalog specifications are based on use at  ordinary room temperature catalog specifications re based on use at ordinary room temperature  (approximately20~25℃.

If a geared motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.

Storage temperature range:

Geared motors should be stored ta a temperature of -15~65℃.

In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.

Service life:

The longevity of geared motors is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.

●Use with a load that exceeds the rated torque

●Frequent starting

●Momentary reversals of turning direction

●Impact loads

●Long-term continuous operation

●Forced turning using the output shaft

●Use in which the permitted overhang load or the permitted thrust load is exceeded

●A pulse drive ,e.g.,a short break,counter electromotive force,PWM control

●Use of a voltage that is nonstandard as regards the rated voltage

●Use outside the prescribed temperature or relative-humidity range,or in a special environment.

●Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.

   dc gear motor    dc gear motor

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gear motor

Gear Motor

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