Original new 100% Manufacturer direct 150W5 ohman brake resistor aluminum shell ladder (Induct | Обустройство дома

Original new 100% Manufacturer direct 150W5 ohman brake resistor aluminum shell ladder (Induct | Обустройство дома

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I. features

II. size structure diagram

III. down load curve

IV. electrical characteristics

performance requirement

test method

temperature coefficient

250ppm/ C

JIS5202-5.2
-55 to +155
T.C.R= (R2-R1) * 10^6/R1 * (T2-T1) (PPM/ C)
R1: normal temperature (T1) impedance value;
Impedance value of +100 () C (T2) at room temperature at R2:

Short time overload

Less than R (1% R0+0.05)

JIS5202-5.5
2.5 times rated voltage for 5 seconds

Terminal tensile strength

40N

JIS5202-6.1
Straight line direction pull 10 seconds

Wet load life

Less than R (5% R0+0.1)

JIS5202-7.9
40 + 2 degrees C, 90 ~ 95% RH
In the humidity chamber with the rated DC voltage test for 1.5 hours, 0.5 hours of continuous testing for 1000 hours to stop

Temperature resistance load life

Less than R (5% R0+0.1)

JIS5202-7.10
70 C in the humidity chamber with the rated DC voltage test for 1.5 hours, 0.5 hours of continuous testing for 1000 hours to stop

Introduction of brake resistance. Small common sense resistor matching

Brake resistor is used to support renewable energy to energy consumption of the motor, it includes resistance and power capacity of two important parameters. Usually in engineering are the most used corrugated resistance and Aluminum Alloy resistance two: corrugated resistance by surface vertical corrugated heat will help reduce the parasitic inductance, and high flame retardant inorganic coating, the effective protection of the resistance wire is not aging, prolong the service life, the original allocation of delta is such resistance; Aluminum Alloy resistance very easily installed or attached to the radiator, beautiful appearance, high heat the Aluminum Alloy box full sealed structure, strong vibration resistance, weather resistance and long term stability; small volume, large power, convenient installation, stable, beautiful appearance, widely used in harsh industrial environments using height.

The calculation of 3 brake resistance and power
3.1 brake usage ED%
Brake use rate of ED%, which is described in the delta brake usage ED%. The brake cycle use rate of T2 ED% is defined as T1 divided by the deceleration deceleration time, brake usage is to allow the braking unit and braking resistance have sufficient time to dissipate the heat generated by braking; when the brake heat resistance, the resistance value will be with the increase of temperature becomes higher, the braking torque is also reduce. Brake use rate ED%= brake time / brake cycle =T1/T2*100%. (Figure 1)
Figure 1 brake usage ED% definition
Now to explain the usage of the concept of brake braking frequency with an example: 10% can understand so, if the brake resistance in 10 seconds can consume 100% of the power, so the braking resistance requires at least 90 seconds to produce heat evaporate.
3.2 brake unit action voltage level
When the DC bus voltage is greater than or equal to the braking voltage level (screening threshold), the brake unit action to carry out energy consumption. Delta brake voltage level as shown in table 1.
3.3 brake resistance design
(1) engineering design
Practice has proved that when the discharge current is equal to half of the rated current of the motor, it can get the same braking torque as the rated torque of the motor, so the rough calculation of the braking resistance is:
RB = 2*UD / IMN
Among them:
UD brake voltage level.
Rated current of IMN motor.
In order to ensure that the inverter is not damaged, the minimum value of the resistance value of the braking resistor is forced to limit the resistance value of the current flowing through the brake resistance. Selection of braking resistance, the resistance value of not less than.
RBmin = UD / IMN
According to the above, select the range of braking resistor for resistance R:
UD / IMN / R > 2*UID IMN

The power consumption of the braking resistor:
When the braking resistor R in the DC voltage of UD circuit, the power consumption of the:
P0 = UD2 / R
Meaning: if the resistance power consumption power in accordance with this value choice, the resistor can access the long time work in circuit.
The resistance power used in the field mainly depends on the brake using rate ED%. Because the braking time of the system is relatively short, in a short time, the braking resistance temperature rise is not enough to achieve stable temperature rise. Therefore, the determination of the braking resistance capacity of the principle is that the temperature rise in the braking resistor does not exceed the allowable value (i.e., the nominal temperature rise) under the premise that the capacity should be reduced as far as possible, the rough algorithm is as follows:
PB = *P*ED% = = *UD2 / R*ED%
Drop coefficient for braking resistor: 1-|R-RB| = RB /
R for the actual selection of resistance.
PB for brake resistance power.

(2) design examples
According to the above formula we can roughly calculated braking resistance we need the resistance and power. Motor with delta VFD075F43A inverter driven 7.5KW as example, 7.5KW motor rated current is 18A, the input voltage is AC460:
RB = 2*UD = 2*800/18 = IMN = 88.9 ohm
RBmin = UD = 800/18 = IMN = 44.4 ohm
Therefore, the brake resistance range:
44.4 R > 88.9

Selection of resistance to choose the market to buy the type and power section is appropriate, choose the resistance of 75 euro.
PB = *UD2/R*ED% = 0.84*8002/75*0.1 = = 716W
According to the actual situation can be calculated in the calculation of the appropriate expansion of the numerical power.