DE102007050266A1 - Roller conveyor system for use in e.g. medical industry, has energy storage attached to consumer to which electric current and/or power is supplied from storage and supply lines, where storage is controlled by loading unit with energy - Google Patents

Abstract

System comprising electrical consumers which can be supplied via first supply lines, wherein each consumer is assigned at least one energy store, the consumer being able to be supplied with electrical current and / or electrical power at least simultaneously from an energy store and the first supply lines.

Description

The The invention relates to a system and a method.

It is known, packages as conveyed with roller conveyor systems to promote in a mail distribution center. For this purpose, at least some rollers of a roller conveyor of an electric motor driven.

Of the The invention is therefore based on the object of protecting the environment, especially to save energy.

According to the invention The object of the system according to claim 1 and in the method solved according to the features specified in claim 9.

Important features in the system are that it comprises electrical consumers that can be supplied via first supply lines,
wherein each consumer is assigned at least one energy store,
wherein the consumer at least temporarily at the same time electric current and / or electric power can be supplied from an energy storage and the first supply lines.

From The advantage here is that the energy from the memory in addition to the Consumer feedable energy a power increase allows the consumer to that the performance over the first supply lines far exceedable. Besides that is the capacity of the energy storage, exemplified as an ultracap or capacitor with big storage capacity accomplished becomes, so large interpretable, that the period of time in which energy from the energy store supplied to the consumer will, is so big that the breakaway torque is applied, is overcome and a first non-zero speed or another operating parameter of the consumer is reached. This period is for example 500 ms or more, preferably one to ten seconds. The bigger this one Time span is the more advantageous the energy can be saved.

Important is also that as supply lines a control voltage, ie no power supply is usable. In industrial plants are For example, 24 volts DC voltage control power supplies widely used and common. However, the maximum allowed Current value here below 10 amps. By means of the energy storage is therefore in the invention, the consumer a short time very much high current and a correspondingly high power available.

Important Features of the invention are that over first supply lines supplyable electrical consumers are provided, each one Consumers is assigned at least one energy store, wherein the consumer at least temporarily more electric power and / or electrical power supplied is over alone the first supply lines.

From The advantage here is that the energy storage as additional at least for a short-term period of sufficient supply source can be used is. about the first supply lines is just a critical current value fed. This current value is either limited by the line cross section the first supply lines or by a requirement to comply with is. The latter specification is, for example, in a parallel connection beneficial to consumers and increases safety.

at an advantageous embodiment of the energy storage is at least from the supply source via the first supply lines and via charging means with energy loadable, especially controlled. The advantage here is that the Charging current is limited and thus the first supply lines not inadmissible be charged. Besides that is at execution the energy storage capacitor as this estimated against too high Charging current.

at In an advantageous embodiment, the energy store is from the consumer, in particular, from a regeneratively operated consumer, via the Charging means with energy loadable. The advantage here is that of regenerated powered consumer stored energy storable and thus the total energy demand over the operating time can be reduced is.

at According to an advantageous embodiment, the consumer comprises a Electric motor. The advantage here is that a motor and a regenerative operation possible is. Furthermore is that for overcoming the breakaway torque necessary high current consumption or the associated one high power requirement easy to apply by means of the use of energy storage as - albeit temporary - additional Power source.

In an advantageous embodiment, the electric motor, an electronic unit that feeds the latter and / or the energy store is surrounded by a roller or drum at least partially housing-forming, in particular wherein the roller or drum is drivable by the electric motor, in particular in rotational movement can be set. The advantage here is that a particularly compact design can be achieved. In addition, housing parts can be saved and shields against electromagnetic Ab radiations. By means of the integrated design, however, the sensor for detecting incoming material to be conveyed integrated in the roller or drum can also be provided and thus the smallest possible delay between arrival and reaction can be provided by specifying a desired speed profile.

at In an advantageous embodiment, the consumer is a roller drive for moving conveyed goods, wherein a sensor is connected to the consumer, which is the arrival of conveyed goods makes detectable at a position and one of these entering Event dependent Controlling the roller drive executable power. The advantage here is that energy can be saved and the Safety can be increased is. Because arriving before is safer at power requirement poor condition be provided.

Vorteiligerweise the sensor is attachable within the roll and detects the Rotational movement of the roller. Thus, no consuming, in particular splash-proof, connecting devices to the housing provided Connect provided by sensor lines. Especially when used in the medical, beverage or food industry Thus, a housing surface is easily providable, which is a fast Drainage of liquid causes and accumulation of liquid prevented.

at In an advantageous embodiment of the drive itself as a sensor used, in particular, the in-coming-coming of the conveyed with a driven by the drive roller, the electric motor of the drive generated regenerative energy or braking energy detectable and used as an event for controlling the speed and / or the torque the role. In particular, so as sensor of the engine itself in Collaboration with a him dining electronic unit providable. in this connection is a controller realized before arriving at zero speed or regulated to a constant speed. The on arrival of conveyed goods occurring deviations from model sizes or their course are usable as speed measurement. Thus, beyond the engine is no additional Sensor necessary.

Important features of the method are that it is intended for operating a system, wherein electrical consumers are supplied via first supply lines,
wherein each consumer is assigned at least one energy store,
wherein the consumer at least temporarily, in particular in a first time interval, electric power and / or electric power is supplied from an energy storage and at the same time, in particular in the first time interval, via the first supply lines.

From The advantage here is that energy can be saved and despite thinner cable cross-sections or predetermined current limits large breakaway torques with accordingly associated high power consumption and power consumption can be realized.

at According to an advantageous embodiment, the consumer comprises a Electric motor, in particular with a dining this electronic unit and / or an energy storage, wherein a roll or drum at least partially is driven by the electric motor, in particular offset in rotational movement becomes. The advantage here is that a roller conveyor for the invention is predictable.

at In an advantageous embodiment, the consumer is a roller drive for moving conveyed goods, wherein a sensor is connected to the consumer, which is the arrival of conveyed goods detected at a position and detected by this event after entering a time-controlled process is executed, in particular a temporal speed curve or torque curve is given. The advantage here is that only when arriving over a Frictional contact further conveying of the good allows is and therefore decentralized solutions, So without connections of the roller drive to a central. Control computer, are predictable.

at In an advantageous embodiment of the drive itself as a sensor used, in particular the in-coming-coming of the conveyed material with a driven by the drive roller, the electric motor of the Drive generated regenerative energy or braking energy detected is used and as an event for controlling the speed and / or the Torque of the roller. The advantage here is that no additional Sensor and associated wiring necessary is. It is therefore a particularly high integration density reachable.

at an advantageous embodiment is after detection of the event the arrival of the conveyed goods at the sensor monitored Position such a speed curve and / or torque curve given that at least in a first period of time the drive a higher one electrical current and / or a higher electrical power is supplied as over the first supply lines is allowed to the maximum. The advantage here is that a safe condition and / or condition prior to arrival which no or only minor electrical power consumption occurs is ingestible. After the arrival is by means of feeding the energy from the energy storage to the desired setpoint course executed controls.

Further advantages result from the sub claims.

The invention will now be explained in more detail with reference to figures:
In the 1 a device according to the invention is schematically sketched. Here is a drive for a drum or a roller 3 shown. There are several such roles 3 in a line, for example as a roller conveyor, provided.

Every role 3 is powered by an electric motor 2 over the wave 7 driven, wherein the electric motor is powered by a power controlling electronic unit. This in turn comprises an energy store 1 , which is designed in the simplest case as a capacitor or Ultracap. The electronics unit is designed with a speed control and / or torque control. In this way, therefore, temporal courses of the rotational speed and / or the torque for the electric motor 2 predetermined.

Preferably, the electric motor 2 , In particular, together with the electronic unit, provided in the interior of the drum, so surrounded by this at least partially housing forming.

The electronics unit is via a first supply line 4 provided. The first supply lines 4 are T-shaped with the second supply line 5 wired.

The first supply lines 4 each have a first line cross-section, so that the allowable current is limited to a first maximum value.

The second supply lines 4 each have a second line cross section, so that the allowable current is limited to a second maximum value.

The electronics unit is also equipped with a sensor 6 connected, with the help of incoming conveyed, such as suitcases, packages, production parts, products or the like, before coming into contact with the role detected. In this way, the electronics unit is able to control the speed of the motor as needed and / or to regulate. So if no material occurs for a long time, large amounts of energy can be saved. In addition, the energy storage is charged during this time.

After detection of the material to be conveyed, the speed setpoint input for the motor is increased by the electronic unit and a high power requirement occurs to overcome the then necessary breakaway torque. The required current value exceeds the maximum permissible current value of the first supply line 4 , In this time range is therefore beyond the maximum allowable current value requirement for power consumption from the energy storage 1 covered. When the desired speed has been reached, it is not necessary to supply energy from the energy store since the permissible current values that can be supplied via the supply line are sufficient.

The charging of the energy store is carried out in such a way that the maximum power available via the first supply line is first supplied to the motor. If the demand required by the engine is less than that required by the first supply line 4 maximum deliverable current, charging means of the electronic unit release the charge of the energy storage, wherein the charging current is limited so that the maximum allowable current in the first supply lines 4 is not exceeded.

Instead of the sensor, the electronic unit itself can also be used to detect the incoming material to be conveyed:
In a further embodiment according to the invention, the first and second supply lines have the same line cross-section, in another embodiment according to the invention, the first and second supply lines have different line cross-sections.

In further exemplary embodiments according to the invention, a DC voltage supply is provided via the first and second supply lines. Here, the electric motor is preferably designed as a DC motor. Particularly simple and advantageous is the use of commonly used in industrial plants 24 volt control voltage supplies as a DC power supply. Alternatively, the electronic unit can also be executed with an inverter supplied with the DC voltage, which makes a three-phase motor available for supply. In this case, an asynchronous motor is preferably providable. However, if a very high breakaway torque is necessary, a synchronous motor is advantageously used. Because of the use of DC are the charging means for the energy storage 1 directly connectable to the supply line. In regenerative operation of the electric motor is the energy storage 1 not only via the first supply lines but also from the engine via the electronics unit loadable. Thus, in such operating conditions a particularly fast charging of the energy storage can be performed. For this purpose, the charging means are designed such that the maximum permissible charging current is greater than the maximum permissible, through the first supply lines durchleitbare, maximum allowable current. This applies in particular also to a power semiconductor switch encompassed by the charging means.

1

energy storage

2

electric motor

3

role

4

first supply line

5

second supply line

6

sensor

7

wave

Claims (13)

System comprising electrical consumers which can be supplied via first supply lines, characterized in that each consumer is assigned at least one energy store, wherein the consumer can at least temporarily be supplied with electrical current and / or electrical power from an energy store and the first supply lines. System, in particular according to claim 1, comprising over first Supply lines supplyable electrical consumers, thereby characterized in that each consumer has at least one energy store is associated with the consumer, at least temporarily more electrical Electricity and / or electric power can be supplied as alone over the first Supply lines. System according to at least one of the preceding Claims, characterized in that the energy store at least from the Over supply Charging means is charged with energy, in particular controlled. System according to at least one of the preceding Claims, characterized in that the energy storage by the consumer, in particular, from a regeneratively operated consumer, via the Charging means is charged with energy. System according to at least one of the preceding Claims, characterized in that the consumer is an electric motor includes. System according to at least one of the preceding Claims, characterized in that the electric motor, a feeding this Electronic unit and / or the energy storage of a roll or Drum at least partially housing forming is surrounded, in particular wherein the roll or drum of the electric motor is driven, in particular in rotational movement is displaceable. System according to at least one of the preceding Claims, characterized in that the consumer is a roller drive for Moving conveyed goods is connected to the consumer, a sensor that the Arrival of conveyed goods makes detectable at a position and one of these entering Event dependent Controlling the roller drive executable power. System according to at least one of the preceding Claims, characterized in that the drive itself is used as a sensor is, in particular, the in-coming-coming of the conveyed goods with a driven by the drive roller, the electric motor of the Drive generated regenerative energy or braking energy detectable is and is suitable as an event for controlling the speed and / or the torque of the roller. Method for operating a system, wherein over first Supply lines are supplied to electrical loads, thereby marked that each consumer at least one energy storage associated is the consumer at least temporarily, in particular in a first time interval, electric current and / or electrical Power supplied is from an energy store and at the same time, especially in the first time interval, about the first supply lines. Method according to at least one of the preceding Claims, characterized in that the consumer is an electric motor includes, in particular with a dining this electronic unit and / or an energy store, wherein a roll or drum at least is partially driven by the electric motor, in particular in rotary motion is offset. Method according to at least one of the preceding Claims, characterized in that the consumer is a roller drive for Moving conveyed goods is connected to the consumer, a sensor that the Arrival of conveyed goods detected at a position and detected by this event after entering a time-controlled process is executed, in particular a temporal speed curve or torque curve predetermined becomes. Method according to at least one of the preceding Claims, characterized in that the drive itself is used as a sensor is, in particular, the in-coming-coming of the conveyed goods with a driven by the drive roller, the electric motor of the Drive generated regenerative energy or braking energy detected is used and as an event for controlling the speed and / or the torque of the roller. Method according to at least one of the preceding gone claims, characterized in that after detection of the event of the arrival of the material to be conveyed at the sensor monitored position such a speed curve and / or torque curve is specified that at least in a first time the drive a higher electric current and / or higher electrical power is supplied as is permissible over the first supply lines maximum.